RASC Calgary Centre
@calgaryrasc.bsky.social
Explore the sky, space and astronomy with the Calgary Centre of The Royal Astronomical Society of Canada!
Email us: inquiries@calgaryrasc.ca
calgary.rasc.ca
Email us: inquiries@calgaryrasc.ca
calgary.rasc.ca
Reposted by RASC Calgary Centre
Here are two 360º all-sky panoramas of the Great Red Aurora of November 11, 2025.
Both are multi-segment panoramas, not single shots, taking about a minute each to shoot, so the image is not a snapshot of the sky at one instant.
Details in the Alt Text.
Both are multi-segment panoramas, not single shots, taking about a minute each to shoot, so the image is not a snapshot of the sky at one instant.
Details in the Alt Text.
November 15, 2025 at 8:05 PM
Here are two 360º all-sky panoramas of the Great Red Aurora of November 11, 2025.
Both are multi-segment panoramas, not single shots, taking about a minute each to shoot, so the image is not a snapshot of the sky at one instant.
Details in the Alt Text.
Both are multi-segment panoramas, not single shots, taking about a minute each to shoot, so the image is not a snapshot of the sky at one instant.
Details in the Alt Text.
Reposted by RASC Calgary Centre
Plains Bison are long gone from most of the 🇨🇦 grasslands - but their past-presence remains. Glacial erratic scratching rocks and grown-over wallows of sign of their past supremacy. #mammals
November 15, 2025 at 8:13 PM
Plains Bison are long gone from most of the 🇨🇦 grasslands - but their past-presence remains. Glacial erratic scratching rocks and grown-over wallows of sign of their past supremacy. #mammals
Reposted by RASC Calgary Centre
Your cool wikipedia animation of the day: https://en.wikipedia.org/wiki/Keogram#/media/File:Keogram_explainer.gif
November 15, 2025 at 8:37 PM
Your cool wikipedia animation of the day: https://en.wikipedia.org/wiki/Keogram#/media/File:Keogram_explainer.gif
Reposted by RASC Calgary Centre
"In The Colours Of A Rainbow?"
Sibbald Pond West of Calgary 20251113T0130Z
Rarely does one capture such a variety of colours in the aurora, the Rayed Arc "Curtain", filled the Western horizon for an hour, there was no real activity in the East.
Sibbald Pond West of Calgary 20251113T0130Z
Rarely does one capture such a variety of colours in the aurora, the Rayed Arc "Curtain", filled the Western horizon for an hour, there was no real activity in the East.
November 15, 2025 at 9:55 PM
"In The Colours Of A Rainbow?"
Sibbald Pond West of Calgary 20251113T0130Z
Rarely does one capture such a variety of colours in the aurora, the Rayed Arc "Curtain", filled the Western horizon for an hour, there was no real activity in the East.
Sibbald Pond West of Calgary 20251113T0130Z
Rarely does one capture such a variety of colours in the aurora, the Rayed Arc "Curtain", filled the Western horizon for an hour, there was no real activity in the East.
Reposted by RASC Calgary Centre
Earlier this week the Aurora Borealis painted the sky with beautiful shades of green and red. The Earth was in the path of a powerful Coronal Mass Ejection and these high energy particles lit up the oxygen in our upper atmosphere. What an awesome natural display! Photos from south Calgary.
November 13, 2025 at 11:09 PM
Earlier this week the Aurora Borealis painted the sky with beautiful shades of green and red. The Earth was in the path of a powerful Coronal Mass Ejection and these high energy particles lit up the oxygen in our upper atmosphere. What an awesome natural display! Photos from south Calgary.
Reposted by RASC Calgary Centre
"Our findings show that ALAN disrupts the fundamental energetic constraints on ecosystem metabolism, warranting the inclusion of light pollution in global change and carbon–climate feedback assessments."
Johnston, Kim, & Harris. Nat. Clim. Chang. (2025). doi.org/10.1038/s415...
Johnston, Kim, & Harris. Nat. Clim. Chang. (2025). doi.org/10.1038/s415...
Widespread influence of artificial light at night on ecosystem metabolism - Nature Climate Change
The authors combine light intensity data with eddy covariance observations from 86 sites to show that artificial light at night increases ecosystem respiration and alters carbon exchange, with impacts...
doi.org
November 12, 2025 at 11:21 PM
"Our findings show that ALAN disrupts the fundamental energetic constraints on ecosystem metabolism, warranting the inclusion of light pollution in global change and carbon–climate feedback assessments."
Johnston, Kim, & Harris. Nat. Clim. Chang. (2025). doi.org/10.1038/s415...
Johnston, Kim, & Harris. Nat. Clim. Chang. (2025). doi.org/10.1038/s415...
Reposted by RASC Calgary Centre
Aurora before bedtime on a work night are the best Aurora 😜
November 12, 2025 at 4:51 PM
Aurora before bedtime on a work night are the best Aurora 😜
Reposted by RASC Calgary Centre
Light pollution: The silent threat to the planet that's easily solved https://phys.org/news/2025-11-pollution-silent-threat-planet-easily.html
Light pollution: The silent threat to the planet that's easily solved
New research has revealed for the first time the full extent of how "Artificial Light At Night" (ALAN) is increasing carbon released by plants and animals across continents—without any increase in the carbon they absorb. The result is reduced carbon storage in ecosystems—which has major implications for climate models and global carbon budgets.
phys.org
November 12, 2025 at 10:14 PM
Light pollution: The silent threat to the planet that's easily solved https://phys.org/news/2025-11-pollution-silent-threat-planet-easily.html
Reposted by RASC Calgary Centre
Quick little time lapse of the aurora this evening!!!
November 12, 2025 at 3:19 AM
Quick little time lapse of the aurora this evening!!!
Reposted by RASC Calgary Centre
November 12, 2025 at 4:10 AM
Reposted by RASC Calgary Centre
#Timelapse of lots of red #aurora looking west from northern Vulcan County. Normally, this view would be dominated by the distant light dome from the City of Calgary’s #lightpollution. #astronomy
November 12, 2025 at 4:20 AM
#Timelapse of lots of red #aurora looking west from northern Vulcan County. Normally, this view would be dominated by the distant light dome from the City of Calgary’s #lightpollution. #astronomy
Reposted by RASC Calgary Centre
A few more photos from tonight’s incredible #aurora. I’m fascinated by the amount of red light tonight. This is generated by oxygen molecules being excited by light plasma at least 600 km above the Earth. The green is also oxygen molecules, but much lower (100-250km). Definitely a great night.
November 12, 2025 at 4:23 AM
A few more photos from tonight’s incredible #aurora. I’m fascinated by the amount of red light tonight. This is generated by oxygen molecules being excited by light plasma at least 600 km above the Earth. The green is also oxygen molecules, but much lower (100-250km). Definitely a great night.
Reposted by RASC Calgary Centre
I’ve seen this shared several times with the header and footer not visible, so you can’t see the artists’s name.
Credit: Leo the Alien — alienyrox on redbubble and other platforms.
Credit: Leo the Alien — alienyrox on redbubble and other platforms.
November 12, 2025 at 5:00 AM
I’ve seen this shared several times with the header and footer not visible, so you can’t see the artists’s name.
Credit: Leo the Alien — alienyrox on redbubble and other platforms.
Credit: Leo the Alien — alienyrox on redbubble and other platforms.
Reposted by RASC Calgary Centre
I haven't yelled that many (overwhelmingly excited) swear words at the sky for a long time. WWOOOOOWWWWW. Reddest auroras I've ever seen!! Usually it takes a long time exposure/CCD camera to see red at all. This is BRIGHT!! You can actually see easily outside […]
[Original post on mastodon.social]
[Original post on mastodon.social]
November 12, 2025 at 1:28 AM
I haven't yelled that many (overwhelmingly excited) swear words at the sky for a long time. WWOOOOOWWWWW. Reddest auroras I've ever seen!! Usually it takes a long time exposure/CCD camera to see red at all. This is BRIGHT!! You can actually see easily outside […]
[Original post on mastodon.social]
[Original post on mastodon.social]
#Timelapse of lots of red #aurora looking west from northern Vulcan County. Normally, this view would be dominated by the distant light dome from the City of Calgary’s #lightpollution. #astronomy
November 12, 2025 at 4:20 AM
#Timelapse of lots of red #aurora looking west from northern Vulcan County. Normally, this view would be dominated by the distant light dome from the City of Calgary’s #lightpollution. #astronomy
November 12, 2025 at 4:10 AM
Reposted by RASC Calgary Centre
Interstellar Comet 3I/ATLAS is visible through telescopes from the Northern Hemisphere. Low to the east in the early morning sky, close to Spica (Alpha Virginis). Latest info. 🔭 🧪 theskylive.com/c2025n1-info
Comet 3I/ATLAS: Complete Information & Live Data | TheSkyLive
3I/ATLAS: Complete and live astronomy data, visibility information, sky charts, graphs, and tools for sky-watchers at all levels.
theskylive.com
November 11, 2025 at 5:25 PM
Interstellar Comet 3I/ATLAS is visible through telescopes from the Northern Hemisphere. Low to the east in the early morning sky, close to Spica (Alpha Virginis). Latest info. 🔭 🧪 theskylive.com/c2025n1-info
Reposted by RASC Calgary Centre
That fuzzy dot at the center of the image is the interstellar comet 3I/ATLAS as captured from my backyard this morning. 🔭
November 11, 2025 at 5:15 PM
That fuzzy dot at the center of the image is the interstellar comet 3I/ATLAS as captured from my backyard this morning. 🔭
Reposted by RASC Calgary Centre
They shall grow not old,
as we that are left grow old:
Age shall not weary them,
nor the years condemn.
At the going down of the sun
And in the morning
We shall remember them.
as we that are left grow old:
Age shall not weary them,
nor the years condemn.
At the going down of the sun
And in the morning
We shall remember them.
November 11, 2025 at 3:12 PM
They shall grow not old,
as we that are left grow old:
Age shall not weary them,
nor the years condemn.
At the going down of the sun
And in the morning
We shall remember them.
as we that are left grow old:
Age shall not weary them,
nor the years condemn.
At the going down of the sun
And in the morning
We shall remember them.
Reposted by RASC Calgary Centre
A geomagnetic storm will hit Earth Tuesday evening with a decent viewing of the auroras including in parts of Canada.
https://ow.ly/Vsnw50XpLu4
https://ow.ly/Vsnw50XpLu4
Parts of Canada could get treated to a northern lights show Tuesday - The Weather Network
A geomagnetic storm will hit Earth Tuesday evening with a decent viewing of the auroras including in parts of Canada
ow.ly
November 11, 2025 at 4:00 AM
A geomagnetic storm will hit Earth Tuesday evening with a decent viewing of the auroras including in parts of Canada.
https://ow.ly/Vsnw50XpLu4
https://ow.ly/Vsnw50XpLu4
Reposted by RASC Calgary Centre
108 is a barred spiral galaxy located about 46 Mly away in the constellation of Ursa Major.
It has been observed to have over 200 globular clusters in orbit about it. #astronomy
It has been observed to have over 200 globular clusters in orbit about it. #astronomy
November 10, 2025 at 11:34 PM
108 is a barred spiral galaxy located about 46 Mly away in the constellation of Ursa Major.
It has been observed to have over 200 globular clusters in orbit about it. #astronomy
It has been observed to have over 200 globular clusters in orbit about it. #astronomy
Reposted by RASC Calgary Centre
🦇 ICYMI
We’ve updated our Bat Ambassador Guide for teachers, interpreters, and anyone sharing bat knowledge. It’s free and packed with outreach tips and Alberta bat info.
Link in comments!
We’ve updated our Bat Ambassador Guide for teachers, interpreters, and anyone sharing bat knowledge. It’s free and packed with outreach tips and Alberta bat info.
Link in comments!
November 10, 2025 at 6:51 PM
🦇 ICYMI
We’ve updated our Bat Ambassador Guide for teachers, interpreters, and anyone sharing bat knowledge. It’s free and packed with outreach tips and Alberta bat info.
Link in comments!
We’ve updated our Bat Ambassador Guide for teachers, interpreters, and anyone sharing bat knowledge. It’s free and packed with outreach tips and Alberta bat info.
Link in comments!