Uploaded April 2022 | Updated September 2026, 2 weeks ago
Tumamoc Hill in Tucson, Arizona is a historical site where people have gazed up at the stars for centuries. Join Active Galactic as we talk to Steve Larson, a research scientist from the University of Arizona, as he leads us through the history of this incredible site that is still actively doing research today.
Special thanks to Steve Larson and the Desert Laboratory on Tumamoc Hill.
Interview by Emmalee Mauldin
Filmed by Aaron Cargile
Edited by Grant Bowman and Martin Somoza
We stream on Twitch now! Join us every Monday, Wednesday, and Friday at TeachAstronomy:
twitch.tv/teachastronomy
Follow us on social media:
Twitter: @activegalactic
Instagram: @activegalacticvideos
Facebook: facebook.com/ActiveGalacticVideos
Tumamoc Hill in Tucson, Arizona is a historical site where people have gazed up at the stars for centuries. Join Active Galactic as we talk to Steve Larson, a research scientist from the University of Arizona, as he leads us through the history of this incredible site that is still actively doing research today.
Special thanks to Steve Larson and the Desert Laboratory on Tumamoc Hill.
Interview by Emmalee Mauldin
Filmed by Aaron Cargile
Edited by Grant Bowman and Martin Somoza
We stream on Twitch now! Join us every Monday, Wednesday, and Friday at TeachAstronomy:
twitch.tv/teachastronomy
Follow us on social media:
Twitter: @activegalactic
Instagram: @activegalacticvideos
Facebook: facebook.com/ActiveGalacticVideos





![This Telescope Was Shot 7 Times (And Hit With a Hammer)
Telescopes are some of the most precisely constructed scientific instruments on the planet. Their mirrors have to be polished to near-perfection to give astronomers a sharp view of the cosmos. So when an employee unloaded the entire clip of a handgun into the Harlan J. Smith telescopes primary mirror, it seems like it should have been the end for the observatory. Shockingly, operations resumed the following night, with the events having an almost negligible effect on the images. Lets explore the paradoxical relationship between the delicate precision and resilience of modern telescopes and learn how it applies to JWST and micrometeoroids.
Written, hosted, and edited by Ansh Gupta
Shot by Ansh Gupta and Caleb Keling
All images attributed to NASA are in the public domain. Additional images licensed under creative commons, as listed below:
[1] Harlan J. Smith at McDonald Observatory by University of Texas at Austin McDonald Observatory - The uploader on Wikimedia Commons received this from the author/copyright holder via photosubmissions., CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=86238137
https://creativecommons.org/licenses/by-sa/4.0/
[2] McDonald Observatory of the University of Texas at Fort Davis by lns1122 - https://www.flickr.com/photos/minijoegreen/30679309180/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=103718393
https://creativecommons.org/licenses/by/2.0/
[3] The Harlan J. Smith Telescope, McDonald Obervatory. Texas. by Zereshk - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8000857
https://creativecommons.org/licenses/by-sa/3.0/
We stream on Twitch now! Join us every Monday, Wednesday, and Friday at TeachAstronomy:
https://twitch.tv/teachastronomy
Follow us on social media:
Twitter: @activegalactic
Instagram: @activegalacticvideos
Facebook: https://www.facebook.com/ActiveGalacticVideos
0:00 I Shot a Telescope
0:48 The Telescope that Got Shot
3:04 JWST Micrometeoroid Impact
“Correction:” 1:05 The incident occurred in February of 1970, not 1990 as stated. This Telescope Was Shot 7 Times (And Hit With a Hammer)](https://i.ytimg.com/vi/mbeXOZdSd3s/mqdefault.jpg)




