Chicago Astronomical Social
@chi-astro-soc.bsky.social
The official account of the Chicago Astronomical Society
Join us monthly at the Cernan Earth and Space Center!
Join us monthly at the Cernan Earth and Space Center!
UPDATE: Tonight's CAS meeting is cancelled due to the cold weather. Our next meeting will be February 28th. See you next month!
January 24, 2026 at 11:12 PM
UPDATE: Tonight's CAS meeting is cancelled due to the cold weather. Our next meeting will be February 28th. See you next month!
The January CAS meeting is TOMORROW! Join us at Cernan at 6pm (or 5pm for pizza) for Bill Higgin's talk, "The Great Telescope of Birr Castle and How a 19th-Century Irish Family Changed Astronomy". Telescope viewing of planets after, weather permitting.
Image credit: birrcastle.com/the-great-te...
Image credit: birrcastle.com/the-great-te...
January 23, 2026 at 8:10 PM
The January CAS meeting is TOMORROW! Join us at Cernan at 6pm (or 5pm for pizza) for Bill Higgin's talk, "The Great Telescope of Birr Castle and How a 19th-Century Irish Family Changed Astronomy". Telescope viewing of planets after, weather permitting.
Image credit: birrcastle.com/the-great-te...
Image credit: birrcastle.com/the-great-te...
Did you see the Aurora Borealis this week in the northern sky? CAS members captured some of the spectacular colors that danced across the night sky from Chicago to New Mexico.
Image credit: Darren Drake (images 1 & 2, Chicago), Signe Mason (image 3, New Mexico)
Image credit: Darren Drake (images 1 & 2, Chicago), Signe Mason (image 3, New Mexico)
November 14, 2025 at 9:25 PM
Did you see the Aurora Borealis this week in the northern sky? CAS members captured some of the spectacular colors that danced across the night sky from Chicago to New Mexico.
Image credit: Darren Drake (images 1 & 2, Chicago), Signe Mason (image 3, New Mexico)
Image credit: Darren Drake (images 1 & 2, Chicago), Signe Mason (image 3, New Mexico)
Join CAS at Cernan Earth & Space Center November 1 to hear our own Dr.Joshua Burton's lecture, "PLUTO HAD IT COMING: Orbital resonance, the Kuiper Belt, and Planet 9"
Image Credit:NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.Processed by Daniel Machacek,2015
Image Credit:NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.Processed by Daniel Machacek,2015
October 28, 2025 at 12:30 AM
Join CAS at Cernan Earth & Space Center November 1 to hear our own Dr.Joshua Burton's lecture, "PLUTO HAD IT COMING: Orbital resonance, the Kuiper Belt, and Planet 9"
Image Credit:NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.Processed by Daniel Machacek,2015
Image Credit:NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.Processed by Daniel Machacek,2015
💫Tomorrow! 💫 Join CAS at Cernan Earth & Space Center for Intl. Observe the Moon Night & lecture "How the Moon's Features Got Their Names" by Bill Higgins!
Meeting Agenda:
5:15- Astro-talk over pizza and soft drinks
6:00 PM- Lecture begins
7:30 PM- Telescope viewing of the Moon, Saturn and Neptune!
Meeting Agenda:
5:15- Astro-talk over pizza and soft drinks
6:00 PM- Lecture begins
7:30 PM- Telescope viewing of the Moon, Saturn and Neptune!
October 4, 2025 at 12:02 AM
💫Tomorrow! 💫 Join CAS at Cernan Earth & Space Center for Intl. Observe the Moon Night & lecture "How the Moon's Features Got Their Names" by Bill Higgins!
Meeting Agenda:
5:15- Astro-talk over pizza and soft drinks
6:00 PM- Lecture begins
7:30 PM- Telescope viewing of the Moon, Saturn and Neptune!
Meeting Agenda:
5:15- Astro-talk over pizza and soft drinks
6:00 PM- Lecture begins
7:30 PM- Telescope viewing of the Moon, Saturn and Neptune!
✨This weekend! ✨
The next CAS meeting is this Saturday, March 8, at 6pm! Join us at the Cernan Earth and Space Center to learn all about variable stars with our speaker, Signe Mason! Weather permitting, there will be an opportunity to view the night sky with telescopes outside. See you there! ⭐️
The next CAS meeting is this Saturday, March 8, at 6pm! Join us at the Cernan Earth and Space Center to learn all about variable stars with our speaker, Signe Mason! Weather permitting, there will be an opportunity to view the night sky with telescopes outside. See you there! ⭐️
March 5, 2025 at 11:56 PM
✨This weekend! ✨
The next CAS meeting is this Saturday, March 8, at 6pm! Join us at the Cernan Earth and Space Center to learn all about variable stars with our speaker, Signe Mason! Weather permitting, there will be an opportunity to view the night sky with telescopes outside. See you there! ⭐️
The next CAS meeting is this Saturday, March 8, at 6pm! Join us at the Cernan Earth and Space Center to learn all about variable stars with our speaker, Signe Mason! Weather permitting, there will be an opportunity to view the night sky with telescopes outside. See you there! ⭐️
The February meeting of the CAS is cancelled due to incoming inclement weather. Join us next month on March 8 to hear Ms. Mason talk about her work on variable stars! ⭐️
February 8, 2025 at 8:32 PM
The February meeting of the CAS is cancelled due to incoming inclement weather. Join us next month on March 8 to hear Ms. Mason talk about her work on variable stars! ⭐️
Check out these stellar pictures our President, Tony, took with his Seestar 50 last week! ✨🔭
#stars #galaxies #telescopes #astronomy
#stars #galaxies #telescopes #astronomy
February 3, 2025 at 4:53 PM
Check out these stellar pictures our President, Tony, took with his Seestar 50 last week! ✨🔭
#stars #galaxies #telescopes #astronomy
#stars #galaxies #telescopes #astronomy
CAS is pleased to announce its next speaker, Signe Mason (B.S. Astrophysics)! On February 8th, Ms. Mason will discuss variable stars and present her own research on the star V1719 Cygni. All knowledge levels are welcome.
Pic: A composite image of V1719 Cygni in B, V, and i’ filters by Ms. Mason
Pic: A composite image of V1719 Cygni in B, V, and i’ filters by Ms. Mason
January 27, 2025 at 2:36 AM
CAS is pleased to announce its next speaker, Signe Mason (B.S. Astrophysics)! On February 8th, Ms. Mason will discuss variable stars and present her own research on the star V1719 Cygni. All knowledge levels are welcome.
Pic: A composite image of V1719 Cygni in B, V, and i’ filters by Ms. Mason
Pic: A composite image of V1719 Cygni in B, V, and i’ filters by Ms. Mason
Welcome to the Bluesky of the Chicago Astronomical Society! Check out this page for information about meetings and Astro events!
Image credit: ESA/Hubble & NASA, R. Windhorst, W. Keel
Image credit: ESA/Hubble & NASA, R. Windhorst, W. Keel
January 21, 2025 at 5:15 PM
Welcome to the Bluesky of the Chicago Astronomical Society! Check out this page for information about meetings and Astro events!
Image credit: ESA/Hubble & NASA, R. Windhorst, W. Keel
Image credit: ESA/Hubble & NASA, R. Windhorst, W. Keel