#sundial — Public Fediverse posts

Today is the day! 4 years of planning and THE STAIRS are in. Nicely aligned with the #telescope too!

https://www.yorku.ca/science/observatory/sundial/
(pictures will be updated soon on the website)

@AllanICarswellObservatory #Sundial #solar #observatory #science #yorkuniversity

Today is the day! 4 years of planning and THE STAIRS are in. Nicely aligned with the #telescope too!

https://www.yorku.ca/science/observatory/sundial/
(pictures will be updated soon on the website)

@AllanICarswellObservatory #Sundial #solar #observatory #science #yorkuniversity

Today is the day! 4 years of planning and THE STAIRS are in. Nicely aligned with the #telescope too!

https://www.yorku.ca/science/observatory/sundial/
(pictures will be updated soon on the website)

@AllanICarswellObservatory #Sundial #solar #observatory #science #yorkuniversity

Today is the day! 4 years of planning and THE STAIRS are in. Nicely aligned with the #telescope too!

https://www.yorku.ca/science/observatory/sundial/
(pictures will be updated soon on the website)

@AllanICarswellObservatory #Sundial #solar #observatory #science #yorkuniversity

Today is the day! 4 years of planning and THE STAIRS are in. Nicely aligned with the #telescope too!

https://www.yorku.ca/science/observatory/sundial/
(pictures will be updated soon on the website)

@AllanICarswellObservatory #Sundial #solar #observatory #science #yorkuniversity

sundial

sundial at the remains of lacock abbey

#photography #photo #england #wiltshire #lacock #abbey #history #nationaltrust #sundial #bronze #stone #romannumerals #shadow #decorative #historic

sundial

sundial at the remains of lacock abbey

#photography #photo #england #wiltshire #lacock #abbey #history #nationaltrust #sundial #bronze #stone #romannumerals #shadow #decorative #historic

sundial

sundial at the remains of lacock abbey

#photography #photo #england #wiltshire #lacock #abbey #history #nationaltrust #sundial #bronze #stone #romannumerals #shadow #decorative #historic

sundial

sundial at the remains of lacock abbey

#photography #photo #england #wiltshire #lacock #abbey #history #nationaltrust #sundial #bronze #stone #romannumerals #shadow #decorative #historic

sundial

sundial at the remains of lacock abbey

#photography #photo #england #wiltshire #lacock #abbey #history #nationaltrust #sundial #bronze #stone #romannumerals #shadow #decorative #historic

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

A real-world, functional instrument: Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

Reliving grade school … cutting out volvelles based on Philipp Apian’s Cosmographia of 1529s and 1530s … lunch time at Osher Map Library!! #maps #volvelle #cartography #sundial #maphistory

Reliving grade school … cutting out volvelles based on Philipp Apian’s Cosmographia of 1529s and 1530s … lunch time at Osher Map Library!! #maps #volvelle #cartography #sundial #maphistory

Reliving grade school … cutting out volvelles based on Philipp Apian’s Cosmographia of 1529s and 1530s … lunch time at Osher Map Library!! #maps #volvelle #cartography #sundial #maphistory

Reliving grade school … cutting out volvelles based on Philipp Apian’s Cosmographia of 1529s and 1530s … lunch time at Osher Map Library!! #maps #volvelle #cartography #sundial #maphistory

Reliving grade school … cutting out volvelles based on Philipp Apian’s Cosmographia of 1529s and 1530s … lunch time at Osher Map Library!! #maps #volvelle #cartography #sundial #maphistory

southern entrance

of St John the Baptist Church in Llanwarne.

#StJohnTheBaptist #Llanwarne #church #churchruin #ruin #sundial #Herefordshire #England #UK #doorsday

southern entrance

of St John the Baptist Church in Llanwarne.

#StJohnTheBaptist #Llanwarne #church #churchruin #ruin #sundial #Herefordshire #England #UK #doorsday

southern entrance

of St John the Baptist Church in Llanwarne.

#StJohnTheBaptist #Llanwarne #church #churchruin #ruin #sundial #Herefordshire #England #UK #doorsday

southern entrance

of St John the Baptist Church in Llanwarne.

#StJohnTheBaptist #Llanwarne #church #churchruin #ruin #sundial #Herefordshire #England #UK #doorsday

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

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

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

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

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

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.

#Sundsvall #sundial #Sonnenuhr

#astronomy

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.

#astronomy

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.

#astronomy

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.

#astronomy

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

Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

Love the Sun, Moon and Stars? Handheld Portable Sundial See it here: https://www.shopwavytail.com/product/handheld-portable-sundial #astrolabes #sundial

#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

...

#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

...

#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

...

#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

...

#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

...

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

#astronomy #science

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.

#astronomy #science

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.