Sharing the Night Sky with the Public Since 1949

For over seventy-five years, the Denver Astronomical Society has brought together stargazers across the Denver metropolitan area and beyond. The society hosts dozens of events and activities yearly to promote amateur astronomy across our unique region, one mile nearer the stars.


  • It is with heartfelt sadness that we report the passing of longtime DAS member John Anderson

    John Edgar Anderson February 23,1938 – May 4, 2023 It is with heartfelt sadness that we report the passing of longtime DAS member John Anderson, who specialized in solar astronomy and spectroscopy.     John Edgar Anderson, 85, of Nederland, … Read More

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  • For the Record

    By Daniel Acker I’m not sure if this is a little “old school” or not but, I have kept observation logs since the early 1980’s and I’ll look back through them from time to time and recall some interesting things … Read More

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  • Tour the Universe with Dean Regas

    In case you missed it, Dean Regas, astronomer at the Cincinnati Observatory, held a webinar recently giving a tour of the universe! It was a tour of everything that we’ve seen so far, and Dean’s goal was to fill everyone … Read More

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  • Newton’s Astronomy Proof

    By Peter Higgins, PhD Isaac Newton lived from 1642 (the year Galileo died) until 1727. He was considered both the first of the age of reason, joining the likes of Laplace, and the last of the alchemists-astrologers who bedazzled Europe’s … Read More

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The Chamberlin Observatory

Chamberlin Observatory Tours

The Denver Astronomical Society hosts weekly and monthly events* at the University of Denver’s historic Chamberlin Observatory, featuring its prized 1894 Alvan Clark-Saegmuller 20-inch refracting telescope. It serves as the DAS home base for numerous Public Nights, Open Houses, and special events throughout the year.

Due to overwhelming demand, we are changing how we reserve our Public Nights and adding more to the calendar. We are sold out into mid-2025 and will not open any more slots until we can revamp our reservation system and get our new teams in place. We are committed to providing you with the best experience, and we apologize for any inconvenience this may cause. Please watch for announcements on our Facebook page and our DAS News page.

If you have any questions about EXISTING reservations or would like to make changes to make changes to your reservation, email us at reservations@denverastro.org.


M•45 – Pleiades, Seven Sisters, Subaru image by Darrell Dodge

Astrophotography Special Interest Group

The Denver Astronomical Society (DAS) has established a Special Interest Group amongst its members devoted to Astrophotography. Do you want to learn or improve your skills in astrophotography? Do you enjoy viewing pictures of the Sun, Moon, Planets, or Deep Sky Objects? Ever wonder if you can take similar images? Maybe you have skills that you could pass on to novice members. Consider joining DAS and being part of this Special Interest Group. Please email us for more information. astrophotogroup@denverastro.org


The Van Nattan-Hansen-Anderson Scholarship

Established in 1973, the DAS Van Nattan-Hansen-Anderson Scholarship supports graduating high school and undergraduate college students majoring in astronomy and the physical sciences. Interested and eligible students are invited to apply for funding on the Scholarship Page.


Astronomical League 50th Anniversary

Access to member profiles and forums