#sundial — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #sundial, aggregated by home.social.
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Just a few more weeks and this big bronze bits will be upright and next to the telescopes! Anyone recognize the design?
Hint: should be accurate to within 5 minutes and over 9ft high
*edited because I realized there were too many Australianisms
#astronomy #science #education #astrodon #solar #timekeeping #Sundial -
Just a few more weeks and this big bronze bits will be upright and next to the telescopes! Anyone recognize the design?
Hint: should be accurate to within 5 minutes and over 9ft high
*edited because I realized there were too many Australianisms
#astronomy #science #education #astrodon #solar #timekeeping #Sundial -
Just a few more weeks and this big bronze bits will be upright and next to the telescopes! Anyone recognize the design?
Hint: should be accurate to within 5 minutes and over 9ft high
*edited because I realized there were too many Australianisms
#astronomy #science #education #astrodon #solar #timekeeping #Sundial -
Just a few more weeks and this big bronze bits will be upright and next to the telescopes! Anyone recognize the design?
Hint: should be accurate to within 5 minutes and over 9ft high
*edited because I realized there were too many Australianisms
#astronomy #science #education #astrodon #solar #timekeeping #Sundial -
Just a few more weeks and this big bronze bits will be upright and next to the telescopes! Anyone recognize the design?
Hint: should be accurate to within 5 minutes and over 9ft high
*edited because I realized there were too many Australianisms
#astronomy #science #education #astrodon #solar #timekeeping #Sundial -
Watch the stars in the same way as astronomers throughout history: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Watch the stars in the same way as astronomers throughout history: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Watch the stars in the same way as astronomers throughout history: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Watch the stars in the same way as astronomers throughout history: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Watch the stars in the same way as astronomers throughout history: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Die Sonnenuhr in Sundsvall läuft noch nicht in der Sommerzeit. Abgesehen davon recht genau.😃
Aufnahmezeitpunkt: 14 August 2026, 15:21
Wenn ich das richtig Interpretiere, entsprechen die Horizontalen Linien jeweils zwei Monate. Gezählt von oben nach unten und wieder hoch. Also, der Schatten der Kugel ist oberhalb der 6. Linie. Das könnte also mitte Mai oder mitte August sein.
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For #SundialSunday, this vertical #sundial on Hôtel de la Bertaudière, where privateer Surcouf has lived. Saint-Malo, France.
My calculated true solar time is 12:53 for this photo: not bad!
This sundial is declining slightly southeast. -
For #SundialSunday, this vertical #sundial on Hôtel de la Bertaudière, where privateer Surcouf has lived. Saint-Malo, France.
My calculated true solar time is 12:53 for this photo: not bad!
This sundial is declining slightly southeast. -
For #SundialSunday, this vertical #sundial on Hôtel de la Bertaudière, where privateer Surcouf has lived. Saint-Malo, France.
My calculated true solar time is 12:53 for this photo: not bad!
This sundial is declining slightly southeast. -
For #SundialSunday, this vertical #sundial on Hôtel de la Bertaudière, where privateer Surcouf has lived. Saint-Malo, France.
My calculated true solar time is 12:53 for this photo: not bad!
This sundial is declining slightly southeast. -
Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial
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#astronomy
Ancient astronomical instruments at the Musée de la Marine, Port-Louis, France.
Wooden persian 'astrolabe quadrant', 19th
Brass Moroccan astrolabe, 19th
Terrestrial compass, ~1640
One of the famous 'Bloud' diptych #sundial, ivory, ~1670...
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#astronomy
Ancient astronomical instruments at the Musée de la Marine, Port-Louis, France.
Wooden persian 'astrolabe quadrant', 19th
Brass Moroccan astrolabe, 19th
Terrestrial compass, ~1640
One of the famous 'Bloud' diptych #sundial, ivory, ~1670...
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#astronomy
Ancient astronomical instruments at the Musée de la Marine, Port-Louis, France.
Wooden persian 'astrolabe quadrant', 19th
Brass Moroccan astrolabe, 19th
Terrestrial compass, ~1640
One of the famous 'Bloud' diptych #sundial, ivory, ~1670...
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#astronomy
Ancient astronomical instruments at the Musée de la Marine, Port-Louis, France.
Wooden persian 'astrolabe quadrant', 19th
Brass Moroccan astrolabe, 19th
Terrestrial compass, ~1640
One of the famous 'Bloud' diptych #sundial, ivory, ~1670...
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#astronomy
Ancient astronomical instruments at the Musée de la Marine, Port-Louis, France.
Wooden persian 'astrolabe quadrant', 19th
Brass Moroccan astrolabe, 19th
Terrestrial compass, ~1640
One of the famous 'Bloud' diptych #sundial, ivory, ~1670...
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This cracked #sundial is waiting for sunlight in front of a bar…
Seen in Carcans (33) France.
#Astronomy -
This cracked #sundial is waiting for sunlight in front of a bar…
Seen in Carcans (33) France.
#Astronomy -
This cracked #sundial is waiting for sunlight in front of a bar…
Seen in Carcans (33) France.
#Astronomy -
This cracked #sundial is waiting for sunlight in front of a bar…
Seen in Carcans (33) France.
#Astronomy -
Don't mind me, I'm just dreaming I was one of Delure's wealthy clients in Paris, commissioning this lovely double #sundial in the 18th c...
The octagonal part is a horizontal sundial, working with the shadow of the tilted edge of the triangle.
The oval is an analemmatic sundial, working with the upright edge of the triangle. The user needs to set the date by sliding the octagon until its edge reaches the current date on the calendar.
These sundials generally have to be oriented along north-south, but this one is self-oriented: rotate it until the shadows of both edges tell the same time. This is possible because the 2 edges have different directions. The sundial then also indicates *true* north.The hour lines are computed for latitude 42°N (Rome), but if you tilt the sundial you can make it work for higher latitudes. A list of cities with their latitudes is provided. A small graduated arrow helps find the correct angle.
Once you have enthralled your guests with this exquisite object, you can set out on a trip to Europe, carefully folding the sundial into its 8cm case.
All photos from M. Delalande, auctioneer. Dated around 1710-1720. The Adler Planetarium (Chicago) owns another copy.
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Don't mind me, I'm just dreaming I was one of Delure's wealthy clients in Paris, commissioning this lovely double #sundial in the 18th c...
The octagonal part is a horizontal sundial, working with the shadow of the tilted edge of the triangle.
The oval is an analemmatic sundial, working with the upright edge of the triangle. The user needs to set the date by sliding the octagon until its edge reaches the current date on the calendar.
These sundials generally have to be oriented along north-south, but this one is self-oriented: rotate it until the shadows of both edges tell the same time. This is possible because the 2 edges have different directions. The sundial then also indicates *true* north.The hour lines are computed for latitude 42°N (Rome), but if you tilt the sundial you can make it work for higher latitudes. A list of cities with their latitudes is provided. A small graduated arrow helps find the correct angle.
Once you have enthralled your guests with this exquisite object, you can set out on a trip to Europe, carefully folding the sundial into its 8cm case.
All photos from M. Delalande, auctioneer. Dated around 1710-1720. The Adler Planetarium (Chicago) owns another copy.
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Don't mind me, I'm just dreaming I was one of Delure's wealthy clients in Paris, commissioning this lovely double #sundial in the 18th c...
The octagonal part is a horizontal sundial, working with the shadow of the tilted edge of the triangle.
The oval is an analemmatic sundial, working with the upright edge of the triangle. The user needs to set the date by sliding the octagon until its edge reaches the current date on the calendar.
These sundials generally have to be oriented along north-south, but this one is self-oriented: rotate it until the shadows of both edges tell the same time. This is possible because the 2 edges have different directions. The sundial then also indicates *true* north.The hour lines are computed for latitude 42°N (Rome), but if you tilt the sundial you can make it work for higher latitudes. A list of cities with their latitudes is provided. A small graduated arrow helps find the correct angle.
Once you have enthralled your guests with this exquisite object, you can set out on a trip to Europe, carefully folding the sundial into its 8cm case.
All photos from M. Delalande, auctioneer. Dated around 1710-1720. The Adler Planetarium (Chicago) owns another copy.
-
Don't mind me, I'm just dreaming I was one of Delure's wealthy clients in Paris, commissioning this lovely double #sundial in the 18th c...
The octagonal part is a horizontal sundial, working with the shadow of the tilted edge of the triangle.
The oval is an analemmatic sundial, working with the upright edge of the triangle. The user needs to set the date by sliding the octagon until its edge reaches the current date on the calendar.
These sundials generally have to be oriented along north-south, but this one is self-oriented: rotate it until the shadows of both edges tell the same time. This is possible because the 2 edges have different directions. The sundial then also indicates *true* north.The hour lines are computed for latitude 42°N (Rome), but if you tilt the sundial you can make it work for higher latitudes. A list of cities with their latitudes is provided. A small graduated arrow helps find the correct angle.
Once you have enthralled your guests with this exquisite object, you can set out on a trip to Europe, carefully folding the sundial into its 8cm case.
All photos from M. Delalande, auctioneer. Dated around 1710-1720. The Adler Planetarium (Chicago) owns another copy.
-
Don't mind me, I'm just dreaming I was one of Delure's wealthy clients in Paris, commissioning this lovely double #sundial in the 18th c...
The octagonal part is a horizontal sundial, working with the shadow of the tilted edge of the triangle.
The oval is an analemmatic sundial, working with the upright edge of the triangle. The user needs to set the date by sliding the octagon until its edge reaches the current date on the calendar.
These sundials generally have to be oriented along north-south, but this one is self-oriented: rotate it until the shadows of both edges tell the same time. This is possible because the 2 edges have different directions. The sundial then also indicates *true* north.The hour lines are computed for latitude 42°N (Rome), but if you tilt the sundial you can make it work for higher latitudes. A list of cities with their latitudes is provided. A small graduated arrow helps find the correct angle.
Once you have enthralled your guests with this exquisite object, you can set out on a trip to Europe, carefully folding the sundial into its 8cm case.
All photos from M. Delalande, auctioneer. Dated around 1710-1720. The Adler Planetarium (Chicago) owns another copy.
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#Astronomy
New meridian #sundial in Paris, at the Université Paris Cité (campus Grands Moulins).More about the project (in french):
https://www.youtube.com/watch?v=t4sH8lbJabI -
#Astronomy
New meridian #sundial in Paris, at the Université Paris Cité (campus Grands Moulins).More about the project (in french):
https://www.youtube.com/watch?v=t4sH8lbJabI -
#Astronomy
New meridian #sundial in Paris, at the Université Paris Cité (campus Grands Moulins).More about the project (in french):
https://www.youtube.com/watch?v=t4sH8lbJabI -
#Astronomy
New meridian #sundial in Paris, at the Université Paris Cité (campus Grands Moulins).More about the project (in french):
https://www.youtube.com/watch?v=t4sH8lbJabI -
#Astronomy
New meridian #sundial in Paris, at the Université Paris Cité (campus Grands Moulins).More about the project (in french):
https://www.youtube.com/watch?v=t4sH8lbJabI -
@sethlombardy very good :,D #gnomon is not for everybody :awesome_rotate: https://en.wikipedia.org/wiki/Gnomon #sundial
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@sethlombardy very good :,D #gnomon is not for everybody :awesome_rotate: https://en.wikipedia.org/wiki/Gnomon #sundial
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@sethlombardy very good :,D #gnomon is not for everybody :awesome_rotate: https://en.wikipedia.org/wiki/Gnomon #sundial
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@sethlombardy very good :,D #gnomon is not for everybody :awesome_rotate: https://en.wikipedia.org/wiki/Gnomon #sundial
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@sethlombardy very good :,D #gnomon is not for everybody :awesome_rotate: https://en.wikipedia.org/wiki/Gnomon #sundial
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Passing through the airport today, I overheard someone talking about the mysterious #moondial of #Ballintoy parish church in #NorthernIreland.
I had never heard of a moondial before and it instantly fascinated me. I just found a photo that shows that the front face is a #sundial but the side face is a moondial or #tidal clock.
I need to visit this church and learn more. Moondials must be incorporated into the mythology of #Pelagia, goddess of the moon and the tides!
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Passing through the airport today, I overheard someone talking about the mysterious #moondial of #Ballintoy parish church in #NorthernIreland.
I had never heard of a moondial before and it instantly fascinated me. I just found a photo that shows that the front face is a #sundial but the side face is a moondial or #tidal clock.
I need to visit this church and learn more. Moondials must be incorporated into the mythology of #Pelagia, goddess of the moon and the tides!
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Passing through the airport today, I overheard someone talking about the mysterious #moondial of #Ballintoy parish church in #NorthernIreland.
I had never heard of a moondial before and it instantly fascinated me. I just found a photo that shows that the front face is a #sundial but the side face is a moondial or #tidal clock.
I need to visit this church and learn more. Moondials must be incorporated into the mythology of #Pelagia, goddess of the moon and the tides!
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Passing through the airport today, I overheard someone talking about the mysterious #moondial of #Ballintoy parish church in #NorthernIreland.
I had never heard of a moondial before and it instantly fascinated me. I just found a photo that shows that the front face is a #sundial but the side face is a moondial or #tidal clock.
I need to visit this church and learn more. Moondials must be incorporated into the mythology of #Pelagia, goddess of the moon and the tides!
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Passing through the airport today, I overheard someone talking about the mysterious #moondial of #Ballintoy parish church in #NorthernIreland.
I had never heard of a moondial before and it instantly fascinated me. I just found a photo that shows that the front face is a #sundial but the side face is a moondial or #tidal clock.
I need to visit this church and learn more. Moondials must be incorporated into the mythology of #Pelagia, goddess of the moon and the tides!
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In 2013, archaeologists from the University of Basel conducting excavations in Egypt's Valley of the Kings unearthed a limestone tile. Initially unremarkable, this piece of rock revealed its historical significance as one of the world's oldest #sundials, dating back to the 13th century BC. "Ra" was developed to bring this 3200 year old artifact back to life.
https://www.thomasweibel.ch/ra/
#archaeology #history #astronomy #webdev #opendata @OpendataCH
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In 2013, archaeologists from the University of Basel conducting excavations in Egypt's Valley of the Kings unearthed a limestone tile. Initially unremarkable, this piece of rock revealed its historical significance as one of the world's oldest #sundials, dating back to the 13th century BC. "Ra" was developed to bring this 3200 year old artifact back to life.
https://www.thomasweibel.ch/ra/
#archaeology #history #astronomy #webdev #opendata @OpendataCH
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In 2013, archaeologists from the University of Basel conducting excavations in Egypt's Valley of the Kings unearthed a limestone tile. Initially unremarkable, this piece of rock revealed its historical significance as one of the world's oldest #sundials, dating back to the 13th century BC. "Ra" was developed to bring this 3200 year old artifact back to life.
https://www.thomasweibel.ch/ra/
#archaeology #history #astronomy #webdev #opendata @OpendataCH
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In 2013, archaeologists from the University of Basel conducting excavations in Egypt's Valley of the Kings unearthed a limestone tile. Initially unremarkable, this piece of rock revealed its historical significance as one of the world's oldest #sundials, dating back to the 13th century BC. "Ra" was developed to bring this 3200 year old artifact back to life.
https://www.thomasweibel.ch/ra/
#archaeology #history #astronomy #webdev #opendata @OpendataCH
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In 2013, archaeologists from the University of Basel conducting excavations in Egypt's Valley of the Kings unearthed a limestone tile. Initially unremarkable, this piece of rock revealed its historical significance as one of the world's oldest #sundials, dating back to the 13th century BC. "Ra" was developed to bring this 3200 year old artifact back to life.
https://www.thomasweibel.ch/ra/
#archaeology #history #astronomy #webdev #opendata @OpendataCH
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New on my #blog: https://aspi.blog/2026/06/12/arisaig-2026-8-the-grounds-of-canna-house/
Continuing my account of my recent Scottish holiday with a look at the grounds of #CannaHouse (we were not on the island long enough to go into the house, which can only be done if one books a tour).
#blogging #blog #photography #Scotland #Arisaig2026 #Canna #CannaHouse #Gardens #Plants #insects #HistoricRelics #"InformationTrays" #Sundial #NationalTrust
