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
Pinned
Two #aurora substorms on the longest night of the year, #WinterSolstice. Imaged from northern Vulcan County, Alberta. #astronomy
I finally scanned my last 6 month solar graph image.
I left a piece of photographic paper in a can (with a pinhole) for 6 months in my backyard.
It appears Calgary experienced a cloudy early summer but then a very sunny late summer & autumn.
The image was scanned, flipped horizontally & inverted.
I left a piece of photographic paper in a can (with a pinhole) for 6 months in my backyard.
It appears Calgary experienced a cloudy early summer but then a very sunny late summer & autumn.
The image was scanned, flipped horizontally & inverted.
January 7, 2026 at 11:01 PM
🔭
Galileo Galilei wrote a letter with the first mention of Jupiter's moons #OTD in 1610, Ganymede, Callisto, & the combined light from Io and Europa, now known as the Galilean moons. By the 15th he had seen all four & named them the Medician Stars in his March, 1610 treatise, Sidereus Nuncius.
January 7, 2026 at 10:58 PM
🔭
Reposted by RASC Calgary Centre
Great story about Tanya Atwater- the young woman who was at the forefront of the plate tectonics revolution.
www.hcn.org/issues/58-1/...
www.hcn.org/issues/58-1/...
How plate tectonics revolutionized our understanding of Earth - High Country News
And how scientist Tanya Atwater was at the center of it all.
www.hcn.org
January 7, 2026 at 4:07 AM
Great story about Tanya Atwater- the young woman who was at the forefront of the plate tectonics revolution.
www.hcn.org/issues/58-1/...
www.hcn.org/issues/58-1/...
Reposted by RASC Calgary Centre
Guys! Guys! This is SO cool. This is a time lapse from the Chandra X-ray Observatory of Kepler’s Supernova Remnant over 25 years!
January 6, 2026 at 9:32 PM
Guys! Guys! This is SO cool. This is a time lapse from the Chandra X-ray Observatory of Kepler’s Supernova Remnant over 25 years!
Reposted by RASC Calgary Centre
Our researchers reveal that light pollution disrupts nocturnal insects & spiders' movements.🏙️🕷️
Dr Rochelle Meah & Prof Nicholas Roberts highlight two key effects:
1️⃣ Masked day-to-night transitions. 🌙🕷️
2️⃣ Blinded polarized light for navigation.☀️🦋
Read➡️: www.sciencedirect.com/science/arti...
Dr Rochelle Meah & Prof Nicholas Roberts highlight two key effects:
1️⃣ Masked day-to-night transitions. 🌙🕷️
2️⃣ Blinded polarized light for navigation.☀️🦋
Read➡️: www.sciencedirect.com/science/arti...
Light pollution creates multiple threats to the movement ecology of nocturnal arthropod taxa
Light pollution is a major contributing factor to declines in global biodiversity1,2 that is steadily increasing in both severity and spatial extent.3…
www.sciencedirect.com
January 5, 2026 at 9:26 AM
Our researchers reveal that light pollution disrupts nocturnal insects & spiders' movements.🏙️🕷️
Dr Rochelle Meah & Prof Nicholas Roberts highlight two key effects:
1️⃣ Masked day-to-night transitions. 🌙🕷️
2️⃣ Blinded polarized light for navigation.☀️🦋
Read➡️: www.sciencedirect.com/science/arti...
Dr Rochelle Meah & Prof Nicholas Roberts highlight two key effects:
1️⃣ Masked day-to-night transitions. 🌙🕷️
2️⃣ Blinded polarized light for navigation.☀️🦋
Read➡️: www.sciencedirect.com/science/arti...
Reposted by RASC Calgary Centre
My talk on "Astronomy vs. the Billionaire Space Race" is for the RASC Victoria chapter's weekly astronomy cafe, and is open to the public (though you are encouraged to join the RASC. If you like astronomy stuff they are a great group!)
More info about the location (the Fairfield Community […]
More info about the location (the Fairfield Community […]
Original post on mastodon.social
mastodon.social
January 5, 2026 at 5:44 AM
My talk on "Astronomy vs. the Billionaire Space Race" is for the RASC Victoria chapter's weekly astronomy cafe, and is open to the public (though you are encouraged to join the RASC. If you like astronomy stuff they are a great group!)
More info about the location (the Fairfield Community […]
More info about the location (the Fairfield Community […]
Reposted by RASC Calgary Centre
📣 Scientists using Hubble have uncovered a new type of astronomical object!
This starless, dark-matter-dominated cloud is a relic from the early Universe, a failed galaxy.
Read more 👉 https://www.esa.int/Science_Exploration/Space_Science/Cloud-9_a_new_celestial_object_found_by_Hubble
🔭 🧪
This starless, dark-matter-dominated cloud is a relic from the early Universe, a failed galaxy.
Read more 👉 https://www.esa.int/Science_Exploration/Space_Science/Cloud-9_a_new_celestial_object_found_by_Hubble
🔭 🧪
January 5, 2026 at 5:15 PM
📣 Scientists using Hubble have uncovered a new type of astronomical object!
This starless, dark-matter-dominated cloud is a relic from the early Universe, a failed galaxy.
Read more 👉 https://www.esa.int/Science_Exploration/Space_Science/Cloud-9_a_new_celestial_object_found_by_Hubble
🔭 🧪
This starless, dark-matter-dominated cloud is a relic from the early Universe, a failed galaxy.
Read more 👉 https://www.esa.int/Science_Exploration/Space_Science/Cloud-9_a_new_celestial_object_found_by_Hubble
🔭 🧪
Reposted by RASC Calgary Centre
A sensational guest post by Derek Cronmiller, Theron Finley Panya Lipovsky and Jan Dettmer of the Yukon Geological Survey: Photos and Preliminary Observations from an Overview Flight of the 6 December 2025 Hubbard Glacier Earthquake, Yukon Territory, Canada.
eos.org/thelandslide...
eos.org/thelandslide...
January 5, 2026 at 7:36 AM
A sensational guest post by Derek Cronmiller, Theron Finley Panya Lipovsky and Jan Dettmer of the Yukon Geological Survey: Photos and Preliminary Observations from an Overview Flight of the 6 December 2025 Hubbard Glacier Earthquake, Yukon Territory, Canada.
eos.org/thelandslide...
eos.org/thelandslide...
Excited to announce a new blog post releasing today: "What Is an Auroral Substorm? A Practical Guide for Beginners." Dive in to learn about the most important concept for aurora chasing:
theauroraguy.com/blogs/blog/a...
theauroraguy.com/blogs/blog/a...
What Is an Auroral Substorm? A Practical Guide for Beginners
If you want to see the aurora, you need to know about auroral substorms. This blog article will teach you what they are and how to predict them.
theauroraguy.com
January 5, 2026 at 7:43 PM
Thread #astronomy #Artemis
Canadians! As early as next month, one of our astronauts will be flying to the Moon.
Tomorrow night, I'm starting a weekly live stream to teach you all about the mission, Artemis II. Two topics (15 mins each) and 15 mins of Q&A.
Starts at 8:00 PM ET. See you there! www.youtube.com/watch?v=eneu...
Tomorrow night, I'm starting a weekly live stream to teach you all about the mission, Artemis II. Two topics (15 mins each) and 15 mins of Q&A.
Starts at 8:00 PM ET. See you there! www.youtube.com/watch?v=eneu...
Canada's Countdown to Artemis II: Jan 5, 2026
YouTube video by Plateau Astro
www.youtube.com
January 5, 2026 at 5:29 AM
Thread #astronomy #Artemis
I like nebulae. JWST style.
The Cosmic Tornado
20×30″ 51×76 cm
Oil on Canvas
2025
Image of Herbig-Haro 49/50 star forming region taken by JWST MIRI & NIRCam
Original, paper & canvas prints available on my website.
The Cosmic Tornado
20×30″ 51×76 cm
Oil on Canvas
2025
Image of Herbig-Haro 49/50 star forming region taken by JWST MIRI & NIRCam
Original, paper & canvas prints available on my website.
January 5, 2026 at 5:22 AM
🔭
Yesterday, January 3, I photographed the first full moon of 2026.
This full moon occurred near perigee (when the moon is closest to the Earth in its elliptical orbit), it is also called a Supermoon.
Photo was taken with a Canon EOS-R camera with an 800mm telephoto lens from south Calgary.
This full moon occurred near perigee (when the moon is closest to the Earth in its elliptical orbit), it is also called a Supermoon.
Photo was taken with a Canon EOS-R camera with an 800mm telephoto lens from south Calgary.
January 5, 2026 at 5:22 AM
🔭
About 5 hours today on the WIP. Worked on the upper right and upper lower left.
Btw. This is Pismis 24 as seen by JWST.
I shall not be naming this painting after the official stellar object name....for reasons 😏
Btw. This is Pismis 24 as seen by JWST.
I shall not be naming this painting after the official stellar object name....for reasons 😏
January 4, 2026 at 12:50 AM
Reposted by RASC Calgary Centre
On a positive note, this was the first full moon of 2026 last night right on schedule. The Tycho crater is highly visible on the lower right and Mare Tranquillitatis is the central of three diagonally aligned dark areas near the top. Neil and Buzz’s footprints still there.
My photo.
My photo.
January 3, 2026 at 3:23 PM
On a positive note, this was the first full moon of 2026 last night right on schedule. The Tycho crater is highly visible on the lower right and Mare Tranquillitatis is the central of three diagonally aligned dark areas near the top. Neil and Buzz’s footprints still there.
My photo.
My photo.
Reposted by RASC Calgary Centre
What happens when sunlight refracts against ice particles? Sun dogs, 22⁰ Halo and Circumzenithal arc and more!! Incredible 360 view of the ice particles! Please share and follow! 😊🎉 #Manitoba #Canada #winter #amazing #skyporn #sky #sundogs #HappyNewYear
#rainbow #weather
youtube.com/shorts/YxDXc...
#rainbow #weather
youtube.com/shorts/YxDXc...
#Manitoba...AMAZING! Sunlight refracting against the ice particles #Canada #cold #winter #skyporn
YouTube video by Shannon Bileski
youtube.com
January 3, 2026 at 12:21 AM
Beautiful frost today
January 2, 2026 at 10:47 PM
Beautiful frost today
Reposted by RASC Calgary Centre
#HappyNewYear from the wildlife of the Weaselhead!
January 2, 2026 at 6:29 PM
#HappyNewYear from the wildlife of the Weaselhead!
Reposted by RASC Calgary Centre
To mark the new year, here are my top 8 blog posts of 2025!
1. I imagined how we would make a feminist map of the Moon, to represent relationships that don't reinforce terrestrial inequalities.
(with contributions from @bettinaforget.bsky.social and @nancyfjorde.bsky.social).
🧪 🔭 #PlanetSci
1. I imagined how we would make a feminist map of the Moon, to represent relationships that don't reinforce terrestrial inequalities.
(with contributions from @bettinaforget.bsky.social and @nancyfjorde.bsky.social).
🧪 🔭 #PlanetSci
A feminist map of the Moon
What if we made a feminist map of the Moon? This is a question I posed on Bluesky in October 2024. To me, the question, methods and results ...
zoharesque.blogspot.com
January 1, 2026 at 7:37 AM
To mark the new year, here are my top 8 blog posts of 2025!
1. I imagined how we would make a feminist map of the Moon, to represent relationships that don't reinforce terrestrial inequalities.
(with contributions from @bettinaforget.bsky.social and @nancyfjorde.bsky.social).
🧪 🔭 #PlanetSci
1. I imagined how we would make a feminist map of the Moon, to represent relationships that don't reinforce terrestrial inequalities.
(with contributions from @bettinaforget.bsky.social and @nancyfjorde.bsky.social).
🧪 🔭 #PlanetSci
That’s no #Moon. That’s our inflatable StarLab planetarium at the Diamond Valley #NewYear2026 celebration. #astronomy #StarWars
January 1, 2026 at 7:48 AM
That’s no #Moon. That’s our inflatable StarLab planetarium at the Diamond Valley #NewYear2026 celebration. #astronomy #StarWars
Reposted by RASC Calgary Centre
🦇We are deeply grateful to our conservation partners, volunteers, and funding organizations whose commitment, collaboration, and generosity make this work possible. Protecting bats - and the ecosystems they support - is a shared effort, and we couldn’t do it without you.
December 31, 2025 at 9:25 PM
🦇We are deeply grateful to our conservation partners, volunteers, and funding organizations whose commitment, collaboration, and generosity make this work possible. Protecting bats - and the ecosystems they support - is a shared effort, and we couldn’t do it without you.
Excited to be part of Diamond Valley’s early evening #NewYear2026 event tonight. We’ll have #telescopes and our planetarium out for the public. www.westernwheel.ca/local-news/n...
New Year’s Eve fireworks in Okotoks and Diamond Valley
Read the full story and comment on WesternWheel.ca
www.westernwheel.ca
December 31, 2025 at 9:44 PM
Excited to be part of Diamond Valley’s early evening #NewYear2026 event tonight. We’ll have #telescopes and our planetarium out for the public. www.westernwheel.ca/local-news/n...
I went through all of my old Medium posts today & removed the paywall so they're free to read for anyone now! From nerding out over Mars to discussing the pyramid scheme of academia to what it's like being a queer+disabled scientist, check out the archives here:
tanyaofmars.medium.com
tanyaofmars.medium.com
Dr. Tanya Harrison – Medium
Read writing from Dr. Tanya Harrison on Medium. Professional Martian who's worked on rocks and robots on the Red Planet, now thinking about curiosity closer to home.
tanyaofmars.medium.com
December 31, 2025 at 3:22 AM
OTD 25ya, Cassini made its closest approach to Jupiter, our gateway to Saturn. Movies of Jup's atmos, moons & rings, & the greatest Jup portrait ever made were just part of our bounty.
Look & recall the wonder of it all! 📰🔭
tinyurl.com/yzpmc9rw - best atm movie!
tinyurl.com/2s4k48wa - more movies
Look & recall the wonder of it all! 📰🔭
tinyurl.com/yzpmc9rw - best atm movie!
tinyurl.com/2s4k48wa - more movies
December 30, 2025 at 8:18 PM
Many people associate Calgary's warm chinook winds with the onset of headaches, but experts say the science behind the correlation remains unclear.
https://ow.ly/O2K550XQbRV
https://ow.ly/O2K550XQbRV
Warm chinook winds bring drop in barometric pressure - The Weather Network
Warm chinook winds bring drop in barometric pressure
ow.ly
December 30, 2025 at 4:19 AM
Reposted by RASC Calgary Centre
🦇2025 we produced a great video about bat houses! If you plan on building some this winter - check out this great compilation of all the things you should know before you choose a spot to install one! (and feel free to subscribe to our YouTube Channel!) #BatFriends
youtu.be/BhJZjQBonkE?...
youtu.be/BhJZjQBonkE?...
Supporting Alberta's Bats: The Role of Bat Boxes in Conservation
YouTube video by Alberta Bats
youtu.be
December 30, 2025 at 3:41 AM
🦇2025 we produced a great video about bat houses! If you plan on building some this winter - check out this great compilation of all the things you should know before you choose a spot to install one! (and feel free to subscribe to our YouTube Channel!) #BatFriends
youtu.be/BhJZjQBonkE?...
youtu.be/BhJZjQBonkE?...