#space_related — Public Fediverse posts

From Wikipedia, the free encyclopedia:

A keogram
("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display, taken from a narrow part of a round screen recorded by a camera, more specifically and ideally in practice a "whole sky camera". These images from the narrow band, which usually face up in the north-south orientation in the Northern Hemisphere and the south-north orientation in the Southern Hemisphere, are collected and form a time-dependent graph of the aurora from that part of the sky. This allows one to easily realize the general activity of the display that night, whether it had been interrupted by weather conditions or not, and allows the determination of the regions in which the aurora was seen in terms of latitude and longitude of the area.

The use of keograms started in the 1970s by Eather et al. to allow a more practical and efficient way of determining the activity of the aurora throughout the recorded night and provide a view of the detailed movements of it, the light of which is also recorded in wavelengths outside of the human visible spectrum. Thus, keograms are also used to analyse the conditions of the equatorial plasma bubbles (EPB) in the ionosphere of the Earth, to estimate its zonal drift at lower latitudes.

This animation illustrates the construction of a keogram. Keogram image generated from the center column of pixels of 997 sequential RGB images using author's software. Each image was a 2 second exposure. Captured at Midnight Dome, Dawson City (Lat 64.067, Long -139.396), on the night of September 6/7, 2021 using an AurorEye portable all-sky imaging camera. Compressed vertically from a 4000px to 240px height.

Date: 7 September 2021
Source: Jeremy Kuzub at Wikimedia

https://en.wikipedia.org/wiki/Keogram

FYI: TOPIC> Auroras
https://defcon.social/@grobi/114646611195811889

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #space_related #space_culture_Club

From Wikipedia, the free encyclopedia:

A keogram
("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display, taken from a narrow part of a round screen recorded by a camera, more specifically and ideally in practice a "whole sky camera". These images from the narrow band, which usually face up in the north-south orientation in the Northern Hemisphere and the south-north orientation in the Southern Hemisphere, are collected and form a time-dependent graph of the aurora from that part of the sky. This allows one to easily realize the general activity of the display that night, whether it had been interrupted by weather conditions or not, and allows the determination of the regions in which the aurora was seen in terms of latitude and longitude of the area.

The use of keograms started in the 1970s by Eather et al. to allow a more practical and efficient way of determining the activity of the aurora throughout the recorded night and provide a view of the detailed movements of it, the light of which is also recorded in wavelengths outside of the human visible spectrum. Thus, keograms are also used to analyse the conditions of the equatorial plasma bubbles (EPB) in the ionosphere of the Earth, to estimate its zonal drift at lower latitudes.

This animation illustrates the construction of a keogram. Keogram image generated from the center column of pixels of 997 sequential RGB images using author's software. Each image was a 2 second exposure. Captured at Midnight Dome, Dawson City (Lat 64.067, Long -139.396), on the night of September 6/7, 2021 using an AurorEye portable all-sky imaging camera. Compressed vertically from a 4000px to 240px height.

Date: 7 September 2021
Source: Jeremy Kuzub at Wikimedia

https://en.wikipedia.org/wiki/Keogram

FYI: TOPIC> Auroras
https://defcon.social/@grobi/114646611195811889

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #space_related #space_culture_Club

From Wikipedia, the free encyclopedia:

A keogram
("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display, taken from a narrow part of a round screen recorded by a camera, more specifically and ideally in practice a "whole sky camera". These images from the narrow band, which usually face up in the north-south orientation in the Northern Hemisphere and the south-north orientation in the Southern Hemisphere, are collected and form a time-dependent graph of the aurora from that part of the sky. This allows one to easily realize the general activity of the display that night, whether it had been interrupted by weather conditions or not, and allows the determination of the regions in which the aurora was seen in terms of latitude and longitude of the area.

The use of keograms started in the 1970s by Eather et al. to allow a more practical and efficient way of determining the activity of the aurora throughout the recorded night and provide a view of the detailed movements of it, the light of which is also recorded in wavelengths outside of the human visible spectrum. Thus, keograms are also used to analyse the conditions of the equatorial plasma bubbles (EPB) in the ionosphere of the Earth, to estimate its zonal drift at lower latitudes.

This animation illustrates the construction of a keogram. Keogram image generated from the center column of pixels of 997 sequential RGB images using author's software. Each image was a 2 second exposure. Captured at Midnight Dome, Dawson City (Lat 64.067, Long -139.396), on the night of September 6/7, 2021 using an AurorEye portable all-sky imaging camera. Compressed vertically from a 4000px to 240px height.

Date: 7 September 2021
Source: Jeremy Kuzub at Wikimedia

https://en.wikipedia.org/wiki/Keogram

FYI: TOPIC> Auroras
https://defcon.social/@grobi/114646611195811889

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #space_related #space_culture_Club

From Wikipedia, the free encyclopedia:

A keogram
("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display, taken from a narrow part of a round screen recorded by a camera, more specifically and ideally in practice a "whole sky camera". These images from the narrow band, which usually face up in the north-south orientation in the Northern Hemisphere and the south-north orientation in the Southern Hemisphere, are collected and form a time-dependent graph of the aurora from that part of the sky. This allows one to easily realize the general activity of the display that night, whether it had been interrupted by weather conditions or not, and allows the determination of the regions in which the aurora was seen in terms of latitude and longitude of the area.

The use of keograms started in the 1970s by Eather et al. to allow a more practical and efficient way of determining the activity of the aurora throughout the recorded night and provide a view of the detailed movements of it, the light of which is also recorded in wavelengths outside of the human visible spectrum. Thus, keograms are also used to analyse the conditions of the equatorial plasma bubbles (EPB) in the ionosphere of the Earth, to estimate its zonal drift at lower latitudes.

This animation illustrates the construction of a keogram. Keogram image generated from the center column of pixels of 997 sequential RGB images using author's software. Each image was a 2 second exposure. Captured at Midnight Dome, Dawson City (Lat 64.067, Long -139.396), on the night of September 6/7, 2021 using an AurorEye portable all-sky imaging camera. Compressed vertically from a 4000px to 240px height.

Date: 7 September 2021
Source: Jeremy Kuzub at Wikimedia

https://en.wikipedia.org/wiki/Keogram

FYI: TOPIC> Auroras
https://defcon.social/@grobi/114646611195811889

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #space_related #space_culture_Club

From Wikipedia, the free encyclopedia:

A keogram
("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display, taken from a narrow part of a round screen recorded by a camera, more specifically and ideally in practice a "whole sky camera". These images from the narrow band, which usually face up in the north-south orientation in the Northern Hemisphere and the south-north orientation in the Southern Hemisphere, are collected and form a time-dependent graph of the aurora from that part of the sky. This allows one to easily realize the general activity of the display that night, whether it had been interrupted by weather conditions or not, and allows the determination of the regions in which the aurora was seen in terms of latitude and longitude of the area.

The use of keograms started in the 1970s by Eather et al. to allow a more practical and efficient way of determining the activity of the aurora throughout the recorded night and provide a view of the detailed movements of it, the light of which is also recorded in wavelengths outside of the human visible spectrum. Thus, keograms are also used to analyse the conditions of the equatorial plasma bubbles (EPB) in the ionosphere of the Earth, to estimate its zonal drift at lower latitudes.

This animation illustrates the construction of a keogram. Keogram image generated from the center column of pixels of 997 sequential RGB images using author's software. Each image was a 2 second exposure. Captured at Midnight Dome, Dawson City (Lat 64.067, Long -139.396), on the night of September 6/7, 2021 using an AurorEye portable all-sky imaging camera. Compressed vertically from a 4000px to 240px height.

Date: 7 September 2021
Source: Jeremy Kuzub at Wikimedia

https://en.wikipedia.org/wiki/Keogram

FYI: TOPIC> Auroras
https://defcon.social/@grobi/114646611195811889

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #space_related #space_culture_Club

2022 March 21

The Sky in 2021
* Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy)
https://www.planetary.org/profiles/cees-bassa
https://www.astron.nl/about/

Explanation:
What if you could see the entire sky -- all at once -- for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by the glow of the Moon. The thinnest part of the black hourglass shape occurs during the summer solstice when days are the longest, while the thickest part occurs at the winter solstice. Yesterday was an equinox -- when night and day were equal -- and the northern-spring equinox from one year ago can actually be located in the keogram -- about three-quarters of the way up.
https://www.nesdis.noaa.gov/about/k-12-education/optical-phenomena/what-solstice
https://apod.nasa.gov/apod/ap220320.html
https://skyandtelescope.org/astronomy-news/how-bright-moon-exactly/
https://apod.nasa.gov/apod/ap220301.html
https://spaceplace.nasa.gov/blue-sky/en/
https://commons.wikimedia.org/wiki/File:Keogram_explainer.gif
https://victoriaweather.ca/keogram.php#:~:text=What%20is%20a%20keogram
https://apod.nasa.gov/apod/ap011119.html

https://apod.nasa.gov/apod/ap220321.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2022 March 21

The Sky in 2021
* Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy)
https://www.planetary.org/profiles/cees-bassa
https://www.astron.nl/about/

Explanation:
What if you could see the entire sky -- all at once -- for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by the glow of the Moon. The thinnest part of the black hourglass shape occurs during the summer solstice when days are the longest, while the thickest part occurs at the winter solstice. Yesterday was an equinox -- when night and day were equal -- and the northern-spring equinox from one year ago can actually be located in the keogram -- about three-quarters of the way up.
https://www.nesdis.noaa.gov/about/k-12-education/optical-phenomena/what-solstice
https://apod.nasa.gov/apod/ap220320.html
https://skyandtelescope.org/astronomy-news/how-bright-moon-exactly/
https://apod.nasa.gov/apod/ap220301.html
https://spaceplace.nasa.gov/blue-sky/en/
https://commons.wikimedia.org/wiki/File:Keogram_explainer.gif
https://victoriaweather.ca/keogram.php#:~:text=What%20is%20a%20keogram
https://apod.nasa.gov/apod/ap011119.html

https://apod.nasa.gov/apod/ap220321.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2022 March 21

The Sky in 2021
* Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy)
https://www.planetary.org/profiles/cees-bassa
https://www.astron.nl/about/

Explanation:
What if you could see the entire sky -- all at once -- for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by the glow of the Moon. The thinnest part of the black hourglass shape occurs during the summer solstice when days are the longest, while the thickest part occurs at the winter solstice. Yesterday was an equinox -- when night and day were equal -- and the northern-spring equinox from one year ago can actually be located in the keogram -- about three-quarters of the way up.
https://www.nesdis.noaa.gov/about/k-12-education/optical-phenomena/what-solstice
https://apod.nasa.gov/apod/ap220320.html
https://skyandtelescope.org/astronomy-news/how-bright-moon-exactly/
https://apod.nasa.gov/apod/ap220301.html
https://spaceplace.nasa.gov/blue-sky/en/
https://commons.wikimedia.org/wiki/File:Keogram_explainer.gif
https://victoriaweather.ca/keogram.php#:~:text=What%20is%20a%20keogram
https://apod.nasa.gov/apod/ap011119.html

https://apod.nasa.gov/apod/ap220321.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2022 March 21

The Sky in 2021
* Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy)
https://www.planetary.org/profiles/cees-bassa
https://www.astron.nl/about/

Explanation:
What if you could see the entire sky -- all at once -- for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by the glow of the Moon. The thinnest part of the black hourglass shape occurs during the summer solstice when days are the longest, while the thickest part occurs at the winter solstice. Yesterday was an equinox -- when night and day were equal -- and the northern-spring equinox from one year ago can actually be located in the keogram -- about three-quarters of the way up.
https://www.nesdis.noaa.gov/about/k-12-education/optical-phenomena/what-solstice
https://apod.nasa.gov/apod/ap220320.html
https://skyandtelescope.org/astronomy-news/how-bright-moon-exactly/
https://apod.nasa.gov/apod/ap220301.html
https://spaceplace.nasa.gov/blue-sky/en/
https://commons.wikimedia.org/wiki/File:Keogram_explainer.gif
https://victoriaweather.ca/keogram.php#:~:text=What%20is%20a%20keogram
https://apod.nasa.gov/apod/ap011119.html

https://apod.nasa.gov/apod/ap220321.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2022 March 21

The Sky in 2021
* Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy)
https://www.planetary.org/profiles/cees-bassa
https://www.astron.nl/about/

Explanation:
What if you could see the entire sky -- all at once -- for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by the glow of the Moon. The thinnest part of the black hourglass shape occurs during the summer solstice when days are the longest, while the thickest part occurs at the winter solstice. Yesterday was an equinox -- when night and day were equal -- and the northern-spring equinox from one year ago can actually be located in the keogram -- about three-quarters of the way up.
https://www.nesdis.noaa.gov/about/k-12-education/optical-phenomena/what-solstice
https://apod.nasa.gov/apod/ap220320.html
https://skyandtelescope.org/astronomy-news/how-bright-moon-exactly/
https://apod.nasa.gov/apod/ap220301.html
https://spaceplace.nasa.gov/blue-sky/en/
https://commons.wikimedia.org/wiki/File:Keogram_explainer.gif
https://victoriaweather.ca/keogram.php#:~:text=What%20is%20a%20keogram
https://apod.nasa.gov/apod/ap011119.html

https://apod.nasa.gov/apod/ap220321.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 21

Solstice on a Spinning Earth
* Image Credit: Meteosat 9, NASA, Earth Observatory, Robert Simmon
https://www.eumetsat.int/our-satellites/meteosat-series
https://www.nasa.gov/
https://earthobservatory.nasa.gov/
https://www.nasa.gov/centers/goddard/about/people/RSimmon.html

Explanation:
Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most. The featured time-lapse video demonstrates this by displaying an entire year on planet Earth in twelve seconds. From geosynchronous orbit, the Meteosat 9 satellite recorded infrared images of the Earth every day at the same local time. The video started at the September 2010 equinox with the terminator line being vertical: an equinox. As the Earth revolved around the Sun, the terminator was seen to tilt in a way that provides less daily sunlight to the northern hemisphere, causing winter in the north. At the most tilt, winter solstice occurred in the north, and summer solstice in the south. As the year progressed, the March 2011 equinox arrived halfway through the video, followed by the terminator tilting the other way, causing winter in the southern hemisphere -- and summer in the north. The captured year ends again with the September equinox, concluding another of the billions of trips the Earth has taken -- and will take
-- around the Sun.
https://en.wikipedia.org/wiki/Terminator_(solar)
https://www.youtube.com/watch?v=LUW51lvIFjg
https://spaceplace.nasa.gov/all-about-earth/en/
https://en.wikipedia.org/wiki/Geosynchronous_orbit
https://en.wikipedia.org/wiki/Meteosat
https://science.nasa.gov/ems/07_infraredwaves/
https://time.gov/
https://apod.nasa.gov/apod/calendar/ca1009.https://apod.nasa.gov/apod/ap220321.htmlhtml
https://science.nasa.gov/earth/
https://spaceplace.nasa.gov/seasons/en/
https://science.nasa.gov/kids/earth/which-pole-is-colder/
https://en.wikipedia.org/wiki/Solstice
https://defcon.social/@grobi/115754395753301984
https://www.universetoday.com/articles/why-are-there-seasons
https://apod.nasa.gov/apod/ap220321.html

https://apod.nasa.gov/apod/ap251221.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 21

Solstice on a Spinning Earth
* Image Credit: Meteosat 9, NASA, Earth Observatory, Robert Simmon
https://www.eumetsat.int/our-satellites/meteosat-series
https://www.nasa.gov/
https://earthobservatory.nasa.gov/
https://www.nasa.gov/centers/goddard/about/people/RSimmon.html

Explanation:
Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most. The featured time-lapse video demonstrates this by displaying an entire year on planet Earth in twelve seconds. From geosynchronous orbit, the Meteosat 9 satellite recorded infrared images of the Earth every day at the same local time. The video started at the September 2010 equinox with the terminator line being vertical: an equinox. As the Earth revolved around the Sun, the terminator was seen to tilt in a way that provides less daily sunlight to the northern hemisphere, causing winter in the north. At the most tilt, winter solstice occurred in the north, and summer solstice in the south. As the year progressed, the March 2011 equinox arrived halfway through the video, followed by the terminator tilting the other way, causing winter in the southern hemisphere -- and summer in the north. The captured year ends again with the September equinox, concluding another of the billions of trips the Earth has taken -- and will take
-- around the Sun.
https://en.wikipedia.org/wiki/Terminator_(solar)
https://www.youtube.com/watch?v=LUW51lvIFjg
https://spaceplace.nasa.gov/all-about-earth/en/
https://en.wikipedia.org/wiki/Geosynchronous_orbit
https://en.wikipedia.org/wiki/Meteosat
https://science.nasa.gov/ems/07_infraredwaves/
https://time.gov/
https://apod.nasa.gov/apod/calendar/ca1009.https://apod.nasa.gov/apod/ap220321.htmlhtml
https://science.nasa.gov/earth/
https://spaceplace.nasa.gov/seasons/en/
https://science.nasa.gov/kids/earth/which-pole-is-colder/
https://en.wikipedia.org/wiki/Solstice
https://defcon.social/@grobi/115754395753301984
https://www.universetoday.com/articles/why-are-there-seasons
https://apod.nasa.gov/apod/ap220321.html

https://apod.nasa.gov/apod/ap251221.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 21

Solstice on a Spinning Earth
* Image Credit: Meteosat 9, NASA, Earth Observatory, Robert Simmon
https://www.eumetsat.int/our-satellites/meteosat-series
https://www.nasa.gov/
https://earthobservatory.nasa.gov/
https://www.nasa.gov/centers/goddard/about/people/RSimmon.html

Explanation:
Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most. The featured time-lapse video demonstrates this by displaying an entire year on planet Earth in twelve seconds. From geosynchronous orbit, the Meteosat 9 satellite recorded infrared images of the Earth every day at the same local time. The video started at the September 2010 equinox with the terminator line being vertical: an equinox. As the Earth revolved around the Sun, the terminator was seen to tilt in a way that provides less daily sunlight to the northern hemisphere, causing winter in the north. At the most tilt, winter solstice occurred in the north, and summer solstice in the south. As the year progressed, the March 2011 equinox arrived halfway through the video, followed by the terminator tilting the other way, causing winter in the southern hemisphere -- and summer in the north. The captured year ends again with the September equinox, concluding another of the billions of trips the Earth has taken -- and will take
-- around the Sun.
https://en.wikipedia.org/wiki/Terminator_(solar)
https://www.youtube.com/watch?v=LUW51lvIFjg
https://spaceplace.nasa.gov/all-about-earth/en/
https://en.wikipedia.org/wiki/Geosynchronous_orbit
https://en.wikipedia.org/wiki/Meteosat
https://science.nasa.gov/ems/07_infraredwaves/
https://time.gov/
https://apod.nasa.gov/apod/calendar/ca1009.https://apod.nasa.gov/apod/ap220321.htmlhtml
https://science.nasa.gov/earth/
https://spaceplace.nasa.gov/seasons/en/
https://science.nasa.gov/kids/earth/which-pole-is-colder/
https://en.wikipedia.org/wiki/Solstice
https://defcon.social/@grobi/115754395753301984
https://www.universetoday.com/articles/why-are-there-seasons
https://apod.nasa.gov/apod/ap220321.html

https://apod.nasa.gov/apod/ap251221.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 21

Solstice on a Spinning Earth
* Image Credit: Meteosat 9, NASA, Earth Observatory, Robert Simmon
https://www.eumetsat.int/our-satellites/meteosat-series
https://www.nasa.gov/
https://earthobservatory.nasa.gov/
https://www.nasa.gov/centers/goddard/about/people/RSimmon.html

Explanation:
Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most. The featured time-lapse video demonstrates this by displaying an entire year on planet Earth in twelve seconds. From geosynchronous orbit, the Meteosat 9 satellite recorded infrared images of the Earth every day at the same local time. The video started at the September 2010 equinox with the terminator line being vertical: an equinox. As the Earth revolved around the Sun, the terminator was seen to tilt in a way that provides less daily sunlight to the northern hemisphere, causing winter in the north. At the most tilt, winter solstice occurred in the north, and summer solstice in the south. As the year progressed, the March 2011 equinox arrived halfway through the video, followed by the terminator tilting the other way, causing winter in the southern hemisphere -- and summer in the north. The captured year ends again with the September equinox, concluding another of the billions of trips the Earth has taken -- and will take
-- around the Sun.
https://en.wikipedia.org/wiki/Terminator_(solar)
https://www.youtube.com/watch?v=LUW51lvIFjg
https://spaceplace.nasa.gov/all-about-earth/en/
https://en.wikipedia.org/wiki/Geosynchronous_orbit
https://en.wikipedia.org/wiki/Meteosat
https://science.nasa.gov/ems/07_infraredwaves/
https://time.gov/
https://apod.nasa.gov/apod/calendar/ca1009.https://apod.nasa.gov/apod/ap220321.htmlhtml
https://science.nasa.gov/earth/
https://spaceplace.nasa.gov/seasons/en/
https://science.nasa.gov/kids/earth/which-pole-is-colder/
https://en.wikipedia.org/wiki/Solstice
https://defcon.social/@grobi/115754395753301984
https://www.universetoday.com/articles/why-are-there-seasons
https://apod.nasa.gov/apod/ap220321.html

https://apod.nasa.gov/apod/ap251221.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 21

Solstice on a Spinning Earth
* Image Credit: Meteosat 9, NASA, Earth Observatory, Robert Simmon
https://www.eumetsat.int/our-satellites/meteosat-series
https://www.nasa.gov/
https://earthobservatory.nasa.gov/
https://www.nasa.gov/centers/goddard/about/people/RSimmon.html

Explanation:
Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most. The featured time-lapse video demonstrates this by displaying an entire year on planet Earth in twelve seconds. From geosynchronous orbit, the Meteosat 9 satellite recorded infrared images of the Earth every day at the same local time. The video started at the September 2010 equinox with the terminator line being vertical: an equinox. As the Earth revolved around the Sun, the terminator was seen to tilt in a way that provides less daily sunlight to the northern hemisphere, causing winter in the north. At the most tilt, winter solstice occurred in the north, and summer solstice in the south. As the year progressed, the March 2011 equinox arrived halfway through the video, followed by the terminator tilting the other way, causing winter in the southern hemisphere -- and summer in the north. The captured year ends again with the September equinox, concluding another of the billions of trips the Earth has taken -- and will take
-- around the Sun.
https://en.wikipedia.org/wiki/Terminator_(solar)
https://www.youtube.com/watch?v=LUW51lvIFjg
https://spaceplace.nasa.gov/all-about-earth/en/
https://en.wikipedia.org/wiki/Geosynchronous_orbit
https://en.wikipedia.org/wiki/Meteosat
https://science.nasa.gov/ems/07_infraredwaves/
https://time.gov/
https://apod.nasa.gov/apod/calendar/ca1009.https://apod.nasa.gov/apod/ap220321.htmlhtml
https://science.nasa.gov/earth/
https://spaceplace.nasa.gov/seasons/en/
https://science.nasa.gov/kids/earth/which-pole-is-colder/
https://en.wikipedia.org/wiki/Solstice
https://defcon.social/@grobi/115754395753301984
https://www.universetoday.com/articles/why-are-there-seasons
https://apod.nasa.gov/apod/ap220321.html

https://apod.nasa.gov/apod/ap251221.html

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

19.12.14 at 02.00 PM Peaio’s Bicycle Path (Belluno, Italy).
The Sun was already behind the mountain.
Close to the winter solstice.
They looks like the lines of a car park. They actually are composed of the ice on the road after a short passing of the Sun (less than a hour), leaving the fence’s shadows printed on the ground.
Surprising natural geometries!

On February 2015 we found the opposite situation, white and black: the shadow and the snow.

Music: "Peppino Impastato" composed and performed by Paolo Battaglia.
Maker: Marcella Giulia Pace

https://greenflash.photo/portfolio/tatoo-solar/

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

19.12.14 at 02.00 PM Peaio’s Bicycle Path (Belluno, Italy).
The Sun was already behind the mountain.
Close to the winter solstice.
They looks like the lines of a car park. They actually are composed of the ice on the road after a short passing of the Sun (less than a hour), leaving the fence’s shadows printed on the ground.
Surprising natural geometries!

On February 2015 we found the opposite situation, white and black: the shadow and the snow.

Music: "Peppino Impastato" composed and performed by Paolo Battaglia.
Maker: Marcella Giulia Pace

https://greenflash.photo/portfolio/tatoo-solar/

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

19.12.14 at 02.00 PM Peaio’s Bicycle Path (Belluno, Italy).
The Sun was already behind the mountain.
Close to the winter solstice.
They looks like the lines of a car park. They actually are composed of the ice on the road after a short passing of the Sun (less than a hour), leaving the fence’s shadows printed on the ground.
Surprising natural geometries!

On February 2015 we found the opposite situation, white and black: the shadow and the snow.

Music: "Peppino Impastato" composed and performed by Paolo Battaglia.
Maker: Marcella Giulia Pace

https://greenflash.photo/portfolio/tatoo-solar/

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

19.12.14 at 02.00 PM Peaio’s Bicycle Path (Belluno, Italy).
The Sun was already behind the mountain.
Close to the winter solstice.
They looks like the lines of a car park. They actually are composed of the ice on the road after a short passing of the Sun (less than a hour), leaving the fence’s shadows printed on the ground.
Surprising natural geometries!

On February 2015 we found the opposite situation, white and black: the shadow and the snow.

Music: "Peppino Impastato" composed and performed by Paolo Battaglia.
Maker: Marcella Giulia Pace

https://greenflash.photo/portfolio/tatoo-solar/

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

19.12.14 at 02.00 PM Peaio’s Bicycle Path (Belluno, Italy).
The Sun was already behind the mountain.
Close to the winter solstice.
They looks like the lines of a car park. They actually are composed of the ice on the road after a short passing of the Sun (less than a hour), leaving the fence’s shadows printed on the ground.
Surprising natural geometries!

On February 2015 we found the opposite situation, white and black: the shadow and the snow.

Music: "Peppino Impastato" composed and performed by Paolo Battaglia.
Maker: Marcella Giulia Pace

https://greenflash.photo/portfolio/tatoo-solar/

#space #astronomy #science #physics #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 20

A Solstice Sun Tattoo
* Image Credit & Copyright: Marcella Pace
https://twanight.org/profile/marcella-giulia-pace/confirmed-photos/page/2/
https://greenflash.photo/
https://www.ragusah24.it/2025/09/12/un-altro-prestigioso-premio-per-la-fotografa-marcella-pace/

Explanation:
The word solstice is from the Latin for Sun and to pause or stand still. And in the days surrounding a solstice the Sun's annual north-south drift in planet Earth's sky does slow down, pause, and then reverse direction. So near the solstice the daily path of the Sun through the sky really doesn't change much. In fact, near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this road to the mountain town of Peaio in northern Italy. The morning frost on the road has melted away only where the sunlight was able to reach the ground. But it remains in the areas persistently shadowed by the fence, tattooing in frost an image of the fence on the asphalt surface.
https://apod.nasa.gov/apod/fap/ap251220.html
https://apod.nasa.gov/apod/ap250102.html
https://earthsky.org/astronomy-essentials/everything-you-need-to-know-december-solstice/
https://apod.nasa.gov/apod/ap110423.html
https://greenflash.photo/portfolio/tatoo-solar/

https://apod.nasa.gov/apod/fap/ap251220.html

#space #astronomy #science #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 20

A Solstice Sun Tattoo
* Image Credit & Copyright: Marcella Pace
https://twanight.org/profile/marcella-giulia-pace/confirmed-photos/page/2/
https://greenflash.photo/
https://www.ragusah24.it/2025/09/12/un-altro-prestigioso-premio-per-la-fotografa-marcella-pace/

Explanation:
The word solstice is from the Latin for Sun and to pause or stand still. And in the days surrounding a solstice the Sun's annual north-south drift in planet Earth's sky does slow down, pause, and then reverse direction. So near the solstice the daily path of the Sun through the sky really doesn't change much. In fact, near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this road to the mountain town of Peaio in northern Italy. The morning frost on the road has melted away only where the sunlight was able to reach the ground. But it remains in the areas persistently shadowed by the fence, tattooing in frost an image of the fence on the asphalt surface.
https://apod.nasa.gov/apod/fap/ap251220.html
https://apod.nasa.gov/apod/ap250102.html
https://earthsky.org/astronomy-essentials/everything-you-need-to-know-december-solstice/
https://apod.nasa.gov/apod/ap110423.html
https://greenflash.photo/portfolio/tatoo-solar/

https://apod.nasa.gov/apod/fap/ap251220.html

#space #astronomy #science #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 20

A Solstice Sun Tattoo
* Image Credit & Copyright: Marcella Pace
https://twanight.org/profile/marcella-giulia-pace/confirmed-photos/page/2/
https://greenflash.photo/
https://www.ragusah24.it/2025/09/12/un-altro-prestigioso-premio-per-la-fotografa-marcella-pace/

Explanation:
The word solstice is from the Latin for Sun and to pause or stand still. And in the days surrounding a solstice the Sun's annual north-south drift in planet Earth's sky does slow down, pause, and then reverse direction. So near the solstice the daily path of the Sun through the sky really doesn't change much. In fact, near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this road to the mountain town of Peaio in northern Italy. The morning frost on the road has melted away only where the sunlight was able to reach the ground. But it remains in the areas persistently shadowed by the fence, tattooing in frost an image of the fence on the asphalt surface.
https://apod.nasa.gov/apod/fap/ap251220.html
https://apod.nasa.gov/apod/ap250102.html
https://earthsky.org/astronomy-essentials/everything-you-need-to-know-december-solstice/
https://apod.nasa.gov/apod/ap110423.html
https://greenflash.photo/portfolio/tatoo-solar/

https://apod.nasa.gov/apod/fap/ap251220.html

#space #astronomy #science #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 20

A Solstice Sun Tattoo
* Image Credit & Copyright: Marcella Pace
https://twanight.org/profile/marcella-giulia-pace/confirmed-photos/page/2/
https://greenflash.photo/
https://www.ragusah24.it/2025/09/12/un-altro-prestigioso-premio-per-la-fotografa-marcella-pace/

Explanation:
The word solstice is from the Latin for Sun and to pause or stand still. And in the days surrounding a solstice the Sun's annual north-south drift in planet Earth's sky does slow down, pause, and then reverse direction. So near the solstice the daily path of the Sun through the sky really doesn't change much. In fact, near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this road to the mountain town of Peaio in northern Italy. The morning frost on the road has melted away only where the sunlight was able to reach the ground. But it remains in the areas persistently shadowed by the fence, tattooing in frost an image of the fence on the asphalt surface.
https://apod.nasa.gov/apod/fap/ap251220.html
https://apod.nasa.gov/apod/ap250102.html
https://earthsky.org/astronomy-essentials/everything-you-need-to-know-december-solstice/
https://apod.nasa.gov/apod/ap110423.html
https://greenflash.photo/portfolio/tatoo-solar/

https://apod.nasa.gov/apod/fap/ap251220.html

#space #astronomy #science #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 December 20

A Solstice Sun Tattoo
* Image Credit & Copyright: Marcella Pace
https://twanight.org/profile/marcella-giulia-pace/confirmed-photos/page/2/
https://greenflash.photo/
https://www.ragusah24.it/2025/09/12/un-altro-prestigioso-premio-per-la-fotografa-marcella-pace/

Explanation:
The word solstice is from the Latin for Sun and to pause or stand still. And in the days surrounding a solstice the Sun's annual north-south drift in planet Earth's sky does slow down, pause, and then reverse direction. So near the solstice the daily path of the Sun through the sky really doesn't change much. In fact, near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this road to the mountain town of Peaio in northern Italy. The morning frost on the road has melted away only where the sunlight was able to reach the ground. But it remains in the areas persistently shadowed by the fence, tattooing in frost an image of the fence on the asphalt surface.
https://apod.nasa.gov/apod/fap/ap251220.html
https://apod.nasa.gov/apod/ap250102.html
https://earthsky.org/astronomy-essentials/everything-you-need-to-know-december-solstice/
https://apod.nasa.gov/apod/ap110423.html
https://greenflash.photo/portfolio/tatoo-solar/

https://apod.nasa.gov/apod/fap/ap251220.html

#space #astronomy #science #astrophotography #photography #nature #solistice #NASA #apod #space_related #space_culture_Club

2025 September 6

Sardinia Sunset
* Image Credit & Copyright: Lorenzo Busilacchi

Explanation:
When the sun sets on September 7, the Full Moon will rise. And on that date denizens around much of our fair planet, including parts of Antarctica, Australia, Asia, Europe, and Africa can witness a total lunar eclipse, with the Moon completely immersed in Earth's shadow. As the bright Full Moon first enters Earth's shadow it will darken, finally taking on a reddish hue during the total eclipse phase. In fact, the color of the Moon during a total lunar eclipse is due to reddened light from sunrises and sunsets around planet Earth. The reddened sunlight is scattered by a dense atmosphere into the planet's otherwise dark central shadow. When the sun set on August 22, this telephoto snapshot of red skies, blue sea, and the Mangiabarche Lighthouse was captured from Sant'Antioco, Sardinia, Italy.
https://earthsky.org/astronomy-essentials/total-lunar-eclipse-september-7-2025/

https://apod.nasa.gov/apod/ap250906.html

#space_related #astroart #art #astrophotography #photography #science #nature #Space_Culture_Club

2013 May 13

Partial Solar Eclipse with Airplane
* Image Credit & Copyright: Phillip Calais

Explanation:
It was just eight minutes after sunrise, last week, and already there were four things in front of the Sun. The largest and most notable was Earth's Moon, obscuring a big chunk of the Sun's lower limb as it moved across the solar disk, as viewed from Fremantle, Australia. This was expected as the image was taken during a partial solar eclipse -- an eclipse that left sunlight streaming around all sides of the Moon from some locations. Next, a band of clouds divided the Sun horizontally while showing interesting internal structure vertically. The third intervening body might be considered to be the Earth's atmosphere, as it dimmed the Sun from its higher altitude brightness while density fluctuations caused the Sun's edges to appear to shimmer. Although closest to the photographer, the least expected solar occulter was an airplane. Quite possibly, passengers on both sides of that airplane were contemplating the unusual view only visible out the eastern-facing windows.

https://apod.nasa.gov/apod/ap130513.html

#space_related #astroart #art #astrophotography #photography #science #nature #Space_Culture_Club

2023 October 8

Plane, Clouds, Moon, Spots, Sun
* Image Credit & Copyright: Doyle and Shannon Slifer

Explanation:
What's that in front of the Sun? The closest object is an airplane, visible just below the Sun's center and caught purely by chance. Next out are numerous clouds in Earth's atmosphere, creating a series of darkened horizontal streaks. Farther out is Earth's Moon, seen as the large dark circular bite on the upper right. Just above the airplane and just below the Sun's surface are sunspots. The main sunspot group captured here, AR 2192, was in 2014 one of the largest ever recorded and had been crackling and bursting with flares since it came around the edge of the Sun a week before. This show of solar silhouettes was unfortunately short-lived. Within a few seconds the plane flew away. Within a few minutes the clouds drifted off. Within a few hours the partial solar eclipse of the Sun by the Moon was over. Fortunately, when it comes to the Sun, even unexpected alignments are surprisingly frequent. Perhaps one will be imaged this Saturday when a new partial solar eclipse will be visible from much of North and South America.

https://apod.nasa.gov/apod/ap231008.html

#space_related #astroart #art #astrophotography #photography #science #nature #Space_Culture_Club

Tardigrades in space

From Wikipedia

The use of tardigrades in space, first proposed in 1964 because of their extreme tolerance to radiation, began in 2007 with the FOTON-M3 mission in low Earth orbit, where they were exposed to space's vacuum for 10 days, and reanimated, just by rehydration, back on Earth. In 2011, tardigrades were on board the International Space Station on STS-134. In 2019, a capsule containing tardigrades was on board the Israeli lunar lander Beresheet which crashed on the Moon.

Tardigrades are small arthropods able to tolerate extreme environments. Many live in tufts of moss, such as on rooftops, where they get repeatedly dried out and rewetted. Others live in the Arctic or atop mountains, where they are exposed to cold. When dried, they go into a cryptobiotic 'tun' state in which metabolism is suspended. They have been described as the toughest animals on Earth.
Their DNA is protected from damage, such as by radiation, by Dsup proteins.

In 1964, R.M. May and colleagues proposed that the tardigrade Macrobiotus areolatus would be a suitable model organism for space experiments because of its exceptional radiation tolerance.

In 2001, R. Bertolani and colleagues proposed tardigrades as a model for a study of animal survival in space. As terrestrial experiments on tardigrades proceeded, knowledge of their survival abilities grew, enabling K.I. Jönsson in 2007, and then other researchers such as Daiki Horikawa in 2008 and Roberto Guidetti in 2012, to present evidence that they would resist desiccation, radiation, heat, and cold, suiting them for astrobiological studies.

In 2008, F. Ono and colleagues suggested that tardigrades might be able to survive a journey through space on a meteorite, enabling panspermia, the transfer of life from one planet to another. [...]
More in ALT-Text
https://en.wikipedia.org/wiki/Tardigrades_in_space

#space #space_related #earth #photography #science #nature #biology #animal #tardigrade #aliens #survivor #Space_Culture_Club

By contributors to Wikimedia projects

Tardigrades,

known colloquially as water bears or moss piglets, are a phylum of eight-legged segmented micro-animals. They were first described by the German zoologist Johann August Ephraim Goeze in 1773, who called them Kleiner Wasserbär 'little water bear'. In 1776, the Italian biologist Lazzaro Spallanzani named them Tardigrada, which means 'slow walkers'.

They live in diverse regions of Earth's biosphere – mountaintops, the deep sea, tropical rainforests, and the Antarctic. Tardigrades are among the most resilient animals known, with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation – that would quickly kill most other forms of life. Tardigrades have survived exposure to outer space.

There are about 1,500 known species in the phylum Tardigrada, a part of the superphylum Ecdysozoa. The earliest known fossil is from the Cambrian, some 500 million years ago. They lack several of the Hox genes found in arthropods, and the middle region of the body corresponding to an arthropod's thorax and abdomen. Instead, most of their body is homologous to an arthropod's head.

Tardigrades are usually about 0.5 mm (0.02 in) long when fully grown. They are short and plump, with four pairs of legs, each ending in claws (usually four to eight) or sticky pads. Tardigrades are prevalent in mosses and lichens and can readily be collected and viewed under a low-power microscope, making them accessible to students and amateur scientists. Their clumsy crawling and their well-known ability to survive life-stopping events have brought them into science fiction and popular culture including items of clothing, statues, soft toys and crochet patterns. [...]

https://en.wikipedia.org/wiki/Tardigrade

#space #space_related #earth #photography #science #nature #biology #animal #tardigrade #aliens #survivor #Space_Culture_Club

2023 May 21

Tardigrade in Moss
* Image Credit & Copyright: Nicole Ottawa & Oliver Meckes / Eye of Science / Science Source Images
https://www.sciencesource.com/

Explanation:
Is this an alien? Probably not, but of all the animals on Earth, the tardigrade might be the candidate. That's because tardigrades are known to be able to go for decades without food or water, to survive temperatures from near absolute zero to well above the boiling point of water, to survive pressures from near zero to well above that on ocean floors, and to survive direct exposure to dangerous radiations. The far-ranging survivability of these extremophiles was tested in 2011 outside an orbiting space shuttle. Tardigrades are so durable partly because they can repair their own DNA and reduce their body water content to a few percent. Some of these miniature water-bears almost became extraterrestrials in 2011 when they were launched toward to the Martian moon Phobos, and again in 2021 when they were launched toward Earth's own moon, but the former launch failed, and the latter landing crashed. Tardigrades are more common than humans across most of the Earth. Pictured here in a color-enhanced electron micrograph, a millimeter-long tardigrade crawls on moss.

https://apod.nasa.gov/apod/ap230521.html

#space #space_related #earth #photography #science #nature #biology #animal #tardigrade #aliens #survivor #Space_Culture_Club

"Before going to bed, we dedicate ourselves once again to the works of Judy W. Ross. Because in an anniversary year, all those involved and supporters should receive the recognition they deserve."

2003 October 17

Astronomy Quilt of the Week
* Credit & Copyright: Judy W. Ross, Point Roberts, WA

Explanation:
Demonstrating her mastery of a traditional astronomical imaging technique quilter and astronomy enthusiast Judy Ross has produced this spectacular composition of "Astronomy Quilt Piece of the Week". Her year-long effort resulted in an arrangement for a six by seven foot quilt consisting of 52 individual pieces (11 inches by 8 inches), one for each week, which she reports were inspired by her steady diet of APOD's daily offerings. Some of the pieces are based on actual pictures, such as the Hubble Space Telescope's view of planet forming AB Aurigae or Bill Keel's image of the nearby Pinwheel Galaxy. Others, with titles like the Blue Carpet Nebula and Duck Contemplates Black Hole, are from her own creative imaginings.

#space #NASA #astrophotography #apod #aniversary #photography #art #astroart #quilting #quilt #craft #space_related #Space_Culture_Club

"How about a little manual work for a change to really come down from the stress of the day? Let's be inspired by the quilting of Judy W. Ross and make ourselves comfortable with a cup of tea."

2004 November 25

What the Hubble Saw
* Credit & Copyright: Judy W. Ross, Point Roberts, WA

Explanation:
In this striking 41 inch by 38 inch quilt, astronomy enthusiast Judy Ross has interpreted some of the Hubble Space Telescope's best galactic and extragalactic vistas. Featured in past APODs, clockwise from the lower right are; the Red Rectangle Nebula, NGC 2392, the Sleeping Beauty Galaxy, V838 Monocerotis - the Milky Way's most mysterious star, and supernova remnant N49 - the cosmic debris from an exploded star. Of course, quilts have been used historically to represent astronomical concepts. And while inspired by the images of the cosmos that she incorporates into her quilts, Ross reports that she is still a little daunted by the intricacies of the Cat's Eye Nebula revealed by the Hubble's sharp vision.
https://quiltindex.org/

https://apod.nasa.gov/apod/ap041125.html

#space #NASA #astrophotography #photography #art #astroart #quilting #quilt #craft #space_related #Space_Culture_Club

2015 December 24

Star Colors and Pinyon Pine
* Image Credit & Copyright: Stan Honda
http://www.stanhonda.com/

Explanation:
Beautiful, luminous decorations on this pinyon pine tree are actually bright stars in the constellation Scorpius and the faint glow of the central Milky Way. Captured in June from the north rim of the Grand Canyon of planet Earth, the shallow, close focus image has rendered pine needles on the tree branch sharp, but blurred the distant stars, their light smeared into remarkably colorful disks. Of course, temperature determines the color of a star. Most of the out-of-focus bright stars of Scorpius show a predominately blue hue, their surface temperatures much hotter than the Sun's. Cooler and larger than the Sun, and noticably redder on the scene, is giant star Antares at the heart of the scorpion. In focused, telescopic views the whitish disk at the upper right would be immediately recognizable though, reflecting the Sun's light as ringed gas giant Saturn.
https://apod.nasa.gov/apod/ap110211.html

https://apod.nasa.gov/apod/ap151224.html

#Space_Culture_Club #space_related #astroart #art #photography #science #nature

@futurebird

"Thank you for accompanying me through space and time!
We are 100 now .. ok with me 101 that's worth a little celebration, isn't it? "

Comet Between Fireworks and Lightning
* Image Credit & Copyright: Antti Kemppainen

Explanation:
Sometimes the sky itself is the best show in town. In January 2007, people from Perth, Australia gathered on a local beach to watch a sky light up with delights near and far. Nearby, fireworks exploded as part of Australia Day celebrations. On the far right, lightning from a thunderstorm flashed in the distance. Near the image center, though, seen through clouds, was the most unusual sight of all: Comet McNaught. The photogenic comet was so bright that it even remained visible though the din of Earthly flashes. Comet McNaught has now returned to the outer Solar System and is now only visible with a large telescope. The featured image is actually a three photograph panorama digitally processed to reduce red reflections from the exploding firework.

https://apod.nasa.gov/apod/ap131110.html

#Space_Culture_Club #space_related #astroart #art #photography #science #nature #philosophy #culture #literature

2020 April 5

Color the Universe! 🎨
* Image Credit: Unknown

Explanation:
Wouldn't it be fun to color in the universe? If you think so, please accept this famous astronomical illustration as a preliminary substitute. You, your friends, your parents or children, can print it out or even color it digitally. While coloring, you might be interested to know that even though this illustration has appeared in numerous places over the past 100 years, the actual artist remains unknown. Furthermore, the work has no accepted name -- can you think of a good one? The illustration, first appearing in a book by Camille Flammarion in 1888, is used frequently to show that humanity's present concepts are susceptible to being supplanted by greater truths.
https://en.wikipedia.org/wiki/Flammarion_engraving
https://www.historyofinformation.com/detail.php?id=3329
https://www.youtube.com/watch?v=6zp60ODhbb4
https://gallica.bnf.fr/ark:/12148/bpt6k408619m/f4.image
https://books.google.com/books?id=ScDVAAAAMAAJ&pg=PA163
https://en.wikipedia.org/wiki/Camille_Flammarion
https://apod.nasa.gov/apod/ap010101.html

https://www.thecolor.com/Category/Coloring/Planets.aspx
https://www.huffpost.com/entry/coloring-for-stress_n_5975832

For Your Contribution:
http://asterisk.apod.com/discuss_apod.php?date=200405

https://apod.nasa.gov/apod/ap200405.html

#Space_Culture_Club #space_related #astroart #art #photography #science #nature #philosophy #culture #literature

Eclipses in mythology and culture

from Contributors to Wikimedia projects

Eclipses of the Sun and of the Moon have been described by nearly every culture. In cultures without an astronomical explanation, eclipses were often attributed to supernatural causes or regarded as bad omens.
---
Religious and cultural practices

While solar and lunar eclipses are today understood astronomically as one celestial body shadowing another, their appearance from Earth does not intuitively belie a similar cause for each.
Mark Littmann, Fred Espenak, and Ken Willcox classified solar eclipse mythologies into four distinct genres:

+ A celestial being (usually a monster) attempts to destroy the Sun.
+ The Sun fights with its lover the Moon.
+ The Sun and Moon make love and discreetly hide themselves in darkness.
+ The Sun god grows angry, sad, sick, or neglectful.
---
Abrahamic religions

In the Talmud, solar eclipses are described as ill omens and several events in the Hebrew Bible are said to have occurred during eclipses. Judaism at large has been accepting of the modern astronomical explanation of eclipses and today many rabbis consider eclipses to be reminders of divinity and a time for prayer and introspection.
___
The periodicity of lunar eclipses been deduced by Neo-Babylonian astronomers in the sixth century BCE and the periodicity of solar eclipses was deduced in first century BCE by Greek astronomers, who developed the Antikythera mechanism and had understood the Sun, Moon, and Earth to be spherical celestial bodies since Aristotle. The astronomical understanding of eclipses was thus well understood in the Ancient Near East in which Christianity developed.
___
The New Testament describes the sky as darkening for hours during the crucifixion of Jesus. As the event's lengthy duration and occurrence on the day of a ...
Read more
https://en.wikipedia.org/wiki/Eclipses_in_mythology_and_culture#

#space_related #astroart #art #photography #science #nature #philosophy #culture #literature #Space_Culture_Club

2020 June 15

A Ring of Fire Sunrise Solar Eclipse
* Video Credit: Colin Legg & Geoff Sims
https://www.facebook.com/ColinLeggPhotography
https://www.facebook.com/BeyondBeneath;
* Music: Peter Nanasi
https://www.peternanasi.com/about

Explanation:
What's rising above the horizon behind those clouds? It's the Sun. Most sunrises don't look like this, though, because most sunrises don't include the Moon. In the early morning of 2013 May 10, however, from Western Australia, the Moon was between the Earth and the rising Sun. At times, it would be hard for the uninformed to understand what was happening. In an annular eclipse, the Moon is too far from the Earth to block the entire Sun, and at most leaves a ring of fire where sunlight pours out around every edge of the Moon. The featured time-lapse video also recorded the eclipse through the high refraction of the Earth's atmosphere just above the horizon, making the unusual rising Sun and Moon appear also flattened. As the video continues on, the Sun continues to rise, and the Sun and Moon begin to separate. This weekend, a new annular solar eclipse will occur, visible from central Africa, the Arabian Peninsula, and a narrow band across Asia, with much of Earth's Eastern hemisphere being able to see a partial solar eclipse.

https://apod.nasa.gov/apod/ap200615.html

#space_related #earth #sun #moon #eclipse #astrophotography #astroart #art #photography #science #nature #NASA #Space_Culture_Club

"Welcome back to the
Space Culture Club
(Feel free to contribute)
https://defcon.social/@grobi/114663418339078163 "

2023 September 17

Moon Mountains Magnified during Ring of Fire Eclipse
* Credit & Copyright: Wang Letian (Eyes at Night)
http://www.luckwlt.com/About%20Me.html

Explanation:
What are those dark streaks in this composite image of a solar eclipse? They are reversed shadows of mountains at the edge of the Moon. The center image, captured from Xiamen, China, has the Moon's center directly in front of the Sun's center. The Moon, though, was too far from the Earth to completely block the entire Sun. Light that streamed around the edges of the Moon is called a ring of fire. Images at each end of the sequence show sunlight that streamed through lunar valleys. As the Moon moved further in front of the Sun, left to right, only the higher peaks on the Moon's perimeter could block sunlight. Therefore, thehttps://defcon.social/@grobi/114663418339078163 dark streaks are projected, distorted, reversed, and magnified shadows of mountains at the Moon's edge. Bright areas are called Baily's Beads. Only people in a narrow swath across Earth's Eastern Hemisphere were able to view this full annular solar eclipse in 2020. Next month, though, a narrow swath crossing both North and South America will be exposed to the next annular solar eclipse. And next April, a total solar eclipse will be visible across North America.

https://apod.nasa.gov/apod/ap230917.html

#space_related #earth #sun #moon #eclipse #astrophotography #astroart #art #photography #science #nature #NASA #Space_Culture_Club

2025 July 1
A fisheye image of the sky is shown on the left with the landscape-foreground surrounding it. The plane of our Milky Way Galaxy runs down the center. At first glance the sky looks like oddly like an eye of a dragon.

Eye Sky a Dragon
* Image Credit & Copyright: Anton Komlev
https://www.instagram.com/komlev.av/

Explanation:
What do you see when you look into this sky? In the center, in the dark, do you see a night sky filled with stars? Do you see a sunset to the left? Clouds all around? Do you see the central band of our Milky Way Galaxy running down the middle? Do you see the ruins of an abandoned outpost on a hill? (The outpost is on Askold Island, Russia.) Do you see a photographer with a headlamp contemplating surreal surroundings? (The featured image is a panorama of 38 images taken last month and compiled into a Little Planet projection.) Do you see a rugged path lined with steps? Or do you see the eye of a dragon?
https://www.instagram.com/p/B1r5mYWIi9k/

Location:
https://www.youtube.com/watch?v=MBRMXR8y9Nc
https://www.rbth.com/arts/travel/2013/09/27/islands_of_riches_off_vladivostok_29725
https://en.wikipedia.org/wiki/Russia

DIY:
https://www.photographymad.com/pages/view/little-planet-photos-5-simple-steps-to-making-panorama-worlds

For Your Desktop:
https://getwallpapers.com/collection/dragon-eye-wallpaper

https://apod.nasa.gov/apod/ap250701.html

#space_related #milkyway #astrophotography #astroart #photography #science #astronomy #nature #NASA #Space_Culture_Club

2014 January 14

The Gegenschein Over Chile
* Image Credit & Copyright: Yuri Beletsky (Las Campanas Observatory, Carnegie Institution)

Explanation:
Is the night sky darkest in the direction opposite the Sun? No. In fact, a rarely discernable faint glow known as the gegenschein (German for "counter glow") can be seen 180 degrees around from the Sun in an extremely dark sky. The gegenschein is sunlight back-scattered off small interplanetary dust particles. These dust particles are millimeter sized splinters from asteroids and orbit in the ecliptic plane of the planets. Pictured above from last year is one of the more spectacular pictures of the gegenschein yet taken. Here a deep exposure of an extremely dark sky over Las Campanas Observatory in Chile shows the gegenschein so clearly that even a surrounding glow is visible. Notable background objects include the Andromeda galaxy, the Pleiades star cluster, the California Nebula, the belt of Orion just below the Orion Nebula and inside Barnard's Loop, and bright stars Rigel and Betelgeuse. The gegenschein is distinguished from zodiacal light near the Sun by the high angle of reflection. During the day, a phenomenon similar to the gegenschein called the glory can be seen in reflecting air or clouds opposite the Sun from an airplane.

https://apod.nasa.gov/apod/ap140114.html

#space_related #space #gegenschein #astrophotography #Photography #mountains #science #physics #nature #Space_Culture_Club

Electronic System is a project of the Belgian synthesizer legend Dan Lacksman.

He has performed under his own name, and in groups (most notably Telex). He was an early adopter of synth music, to the point where the first synthesizer he bought, just 3 years before the release of this song, was the first one in Belgium!

“Skylab” is a 14 minute long voyage through time and space. It’s definitely more of a lazy pleasure cruise than a hyperspace rush; you get plenty of time to appreciate the scenery.

And what scenery! The basis of the track is a sort of slow, jazzy strut, with a smooth bass part and a relaxed drum section. The dreamy electric piano lays down the primary texture for the song, which is embellished by confident Moog noodling.

The track was released in 1974 on the album Tchip.Tchip (Vol. 3), although a different version was released first in 1973 on a different version of the album called Electronic System 3, which is credited to “Dan Lacksman With Moog Synthesizer”.

Credit:
mymusic365.co.uk

#space_related #space #music #jazz #moog #skylab #grobi_muzak #Space_Culture_Club

"Ahem, yes.. and no this is not First Mate Piggy's spacesuit and not Michael Jackson's costume for one of his most famous stage performances, even if this sculpture was called "Mooooonwalk", but read on for yourself..."

Suiting Up for the Moon
* Image Credit & Copyright: Robert Nemiroff (Michigan Tech. U.)
https://www.mtu.edu/physics/
https://www.mtu.edu/physics/department/faculty/nemiroff/

Explanation:
How will cows survive on the Moon? One of the most vexing questions asked about space, scientists have spent decades debating this key issue. Finally, after extensive computer modeling and over a dozen midnight milkings, engineers have designed, built, and now tested the new Lunar Grazing Module (LGM), a multi-purpose celestial bovine containment system. By now, many of you will not be surprised to be wished a Happy April Fool's Day from APOD. To the best of our knowledge, there are no current plans to launch cows into space. For one reason, cows tend to be large animals that don't launch easily or cheaply. As friendly as cows may be, head-to-head comparisons show that robotic rovers are usually more effective as scientific explorers. The featured image is of a thought-provoking work of art named "Mooooonwalk" which really is on display at a popular science museum.

+ Tech
https://www.ominous-valve.com/images/1954_c64.jpg
https://apod.nasa.gov/apod/ap140627.html

+ Science
https://science.nasa.gov/planetary-science/programs/mars-exploration/

+ Music
https://www.youtube.com/watch?v=lXKDu6cdXLI

+ Culture
https://en.wikipedia.org/wiki/April_Fools%27_Day

+ Nature
https://www.wikihow.com/Milk-a-Cow

https://apod.nasa.gov/apod/ap150401.html

#space_related #space #astrophotography #astroart #art #photography #science #nature #NASA #biology #culture #physics #Space_Culture_Club #tech

2021 July 10

Mercury and the Da Vinci Glow
* Image Credit & Copyright: Gabriel Funes

Explanation:
On July 8th early morning risers saw Mercury near an old Moon low on the eastern horizon. On that date bright planet, faint glow of lunar night side, and sunlit crescent were captured in this predawn skyscape from Tenerife's Teide National Park in the Canary Islands. Never far from the Sun in planet Earth's sky, the fleeting inner planet shines near its brightest in the morning twilight scene. Mercury lies just below the zeta star of the constellation Taurus, Zeta Tauri, near the tip of the celestial bull's horn. Of course the Moon's ashen glow is earthshine, earthlight reflected from the Moon's night side. A description of earthshine, in terms of sunlight reflected by Earth's oceans illuminating the Moon's dark surface, was written over 500 years ago by Leonardo da Vinci. Waiting for the coming dawn in the foreground are the Teide Observatory's sentinels of the Sun, also known as (large domes left to right) the THEMIS, VTT, and GREGOR solar telescopes.
https://earthsky.org/astronomy-essentials/visible-planets-tonight-mars-jupiter-venus-saturn-mercury/
https://earthobservatory.nasa.gov/IOTD/view.php?id=83782
https://science.nasa.gov/mercury/

https://science.nasa.gov/science-news/science-at-nasa/2005/04oct_leonardo

https://www.iac.es/en/observatorios-de-canarias/teide-observatory

#space_related #astrophotography #astroart #art #photography #science #nature #NASA #biology #Space_Culture_Club

2024 September 14

The Moona Lisa
* Image Credit & Copyright: Gianni Sarcone and Marcella Giulia Pace
https://en.wikipedia.org/wiki/Gianni_A._Sarcone

Explanation:
Only natural colors of the Moon in planet Earth's sky appear in this creative visual presentation. Arranged as pixels in a framed image, the lunar disks were photographed at different times. Their varying hues are ultimately due to reflected sunlight affected by changing atmospheric conditions and the alignment geometry of Moon, Earth, and Sun. Here, the darkest lunar disks are the colors of earthshine. A description of earthshine, in terms of sunlight reflected by Earth's oceans illuminating the Moon's dark surface, was written over 500 years ago by Leonardo da Vinci. But stand farther back from your screen or just shift your gaze to the smaller versions of the image. You might also see one of da Vinci's most famous works of art.
https://en.wikipedia.org/wiki/Gianni_A._Sarcone

https://artsandculture.google.com/asset/portrait-of-lisa-gherardini-wife-of-francesco-del-giocondo-known-as-monna-lisa-la-gioconda-or-mona-lisa-1503-1519-leonardo-di-ser-piero-da-vinci-dit-l%C3%A9onard-de-vinci-1452-1519-paris-mus%C3%A9e-du-louvre/uQGZ28lYUJ3OGw?hl=en&ms=%7B%22x%22%3A0.7%2C%22y%22%3A0.3638750021607957%2C%22z%22%3A9%2C%22size%22%3A%7B%22width%22%3A2.4024024024024024%2C%22height%22%3A0.75%7D%7D

https://svs.gsfc.nasa.gov/5187/

https://apod.nasa.gov/apod/ap240914.html

#space_related #astrophotography #astroart #art #photography #science #nature #NASA #literature #Space_Culture_Club

2019 October 23

Starry Night by Vincent van Gogh
* Painting Credit: Vincent van Gogh;
https://en.wikipedia.org/wiki/Vincent_van_Gogh
* Digital Rendering: MoMA, Google Arts & Culture, via Wikipedia
https://www.moma.org/collection/works/79802

Explanation:
The painting Starry Night is one of the most famous icons of the night sky ever created. The scene was painted by Vincent van Gogh in southern France in 1889. The swirling style of Starry Night appears, to many, to make the night sky come alive. Although van Gogh frequently portrayed real settings in his paintings, art historians do not agree on precisely what stars and planets are being depicted in Starry Night. The style of Starry Night is post-impressionism, a popular painting style at the end of the nineteenth century. The original Starry Night painting hangs in the Museum of Modern Art in New York City, New York, USA. https://en.wikipedia.org/wiki/The_Starry_Night

!>> https://sketchfab.com/3d-models/the-starry-night-756b03a918544497b7a4ba644e37550b
https://www.ibiblio.org/wm/paint/auth/gogh/
https://vangoghletters.org/vg/
https://en.wikipedia.org/wiki/Starry_Night_Over_the_Rh%C3%B4ne
https://www.andreaplanet.com/mosaic/starrynight/
https://en.wikipedia.org/wiki/Post-Impressionism

https://www.moma.org/

https://apod.nasa.gov/apod/ap191023.html

#space_related #astroart #art #photography #science #nature #culture #Space_Culture_Club

2018 March 19

The Nebra Sky Disk
* Image Credit: Dbachmann, Wikipedia
https://en.wikipedia.org/wiki/User_talk:Dbachmann
https://commons.wikimedia.org/wiki/File:Nebra_Scheibe.jpg

Explanation:
Some consider it the oldest known illustration of the night sky. But what, exactly, does it depict, and why was it made? The Nebra sky disk was found with a metal detector in 1999 by treasure hunters near Nebra, Germany, in the midst of several bronze-age weapons. The ancient artifact spans about 30 centimeters and has been associated with the Unetice culture that inhabited part of Europe around 1600 BC. Reconstructed, the dots are thought to represent stars, with the cluster representing the Pleiades, and the large circle and the crescent representing the Sun and Moon. The purpose of the disk remains unknown -- hypotheses including an astronomical clock, a work of art, and a religious symbol. Valued at about $11 million, some believe that the Nebra sky disk is only one of a pair, with the other disk still out there waiting to be discovered.

+ #History & Culture
https://en.wikipedia.org/wiki/Nebra_sky_disc
https://www.worldhistory.org/article/235/the-nebra-sky-disk---ancient-map-of-the-stars/
https://en.wikipedia.org/wiki/Nebra_(Unstrut)
https://www.science.org/content/article/slaughter-bridge-uncovering-colossal-bronze-age-battle
https://en.wikipedia.org/wiki/%C3%9An%C4%9Btice_culture
https://en.wikipedia.org/wiki/1600s_BC_(decade)
https://en.wikipedia.org/wiki/Bronze_Age_Europe

https://apod.nasa.gov/apod/ap171107.html

+ Constellation
https://apod.nasa.gov/apod/ap171114.html
https://apod.nasa.gov/apod/ap160919.html
https://apod.nasa.gov/apod/ap180318.html

#space_related #astrophotography #astroart #art #photography #science #nature #NASA #philosophy #biology #culture #literature #Space_Culture_Club

2021 January 12

A Historic Brazilian Constellation
* Image Credit & Copyright: Rodrigo Guerra
https://www.instagram.com/rodrigoguerra13/

Explanation:
The night sky is filled with stories. Cultures throughout history have projected some of their most enduring legends onto the stars above. Generations of people see these stellar constellations, hear the associated stories, and pass them down. Featured here is the perhaps unfamiliar constellation of the Old Man, long recognized by the Tupi peoples native to regions of South America now known as Brazil. The Old Man, in more modern vernacular, may be composed of the Hyades star cluster as his head and the belt of Orion as part of one leg. Tupi folklore relates that the other leg was cut off by his unhappy wife, causing it to end at the orange star now known as Betelgeuse. The Pleiades star cluster, on the far left, can be interpreted as a head feather. In the featured image, the hobbled Old Man is mirrored by a person posing in the foreground. Folklore of the night sky is important for many reasons, including that it records cultural heritage and documents the universality of human intelligence and imagination.

+ Culture
https://www.jstor.org/stable/43392390
https://en.wikipedia.org/wiki/Tupi_people

+ Constellation
https://apod.nasa.gov/apod/ap191206.html
https://apod.nasa.gov/apod/ap161204.html
https://apod.nasa.gov/apod/ap200101.html
https://apod.nasa.gov/apod/ap190901.html

https://apod.nasa.gov/apod/ap210112.html

#space_related #astrophotography #astroart #art #photography #science #nature #NASA #philosophy #biology #culture #literature #Space_Culture_Club

TOPIC>
Space Culture Club
(Feel free to contribute, rather as a reply than using the hashtag)

"Welcome to Space's Culture Club! Make yourself comfortable and treat yourself to a good cup of tea in a pleasant atmosphere. We deal with space-related topics in terms of cultures, history, philosophy, art, literature and more in friendly company whether member or not!"

Human as Spaceship
* Space Image Credit: NASA, ESA, Hubble, and J. Maiz- Apellániz (IAA);
https://www.iaa.es/
https://www.spacetelescope.org/
https://www.esa.int/
https://www.nasa.gov/
* Acknowledgement: D. De Martin;
* Human Image Copyright: Charis Tsevis;
https://www.tsevis.com/
* Composition: R. J. Nemiroff
https://www.mtu.edu/physics/department/faculty/nemiroff/

Explanation:
You are a spaceship soaring through the universe. So is your dog. We all carry with us trillions of microorganisms as we go through life. These multitudes of bacteria, fungi, and archaea have different DNA than you. Collectively called your microbiome, your shipmates outnumber your own cells. Your crew members form communities, help digest food, engage in battles against intruders, and sometimes commute on a liquid superhighway from one end of your body to the other. Much of what your microbiome does, however, remains unknown. You are the captain, but being nice to your crew may allow you to explore more of your local cosmos.

https://apod.nasa.gov/apod/ap190818.html

#space_related #astrophotography #astroart #art #photography #science #nature #NASA #philosophy #biology #culture #literature #Space_Culture_Club