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.

  • What’s Up in Denver? December 29th. 2025 through January 4th, 2026

    Here’s a brief look at what’s going on in the Mile High City this week. December 29: DAS E-Board Meeting (virtual meeting): Online via Zoom (check membership email and slack for details): 7:00 PM December 30:  Get to know the

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  • Friends with a Comet? Skyward for January 2026

    Can you be friends with a comet? Yes!  Of course. I like to imagine that I can.  Of the 241 comet friends I have observed since I first spotted Comet Ikeya-Seki in October of 1965,  Comet 3I/ATLAS has got to

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  • What’s Up in Denver? December 22nd through 28th, 2025

    Here’s a brief look at what’s going on in the Mile High City this week. December 22 (Last Day of Hanukkah): Discover the Stars at the Denver Christkindl Market with AstroTours (Free in-person event): 📍Auraria Campus, Tivoli Quad: 6:00 PM

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  • What’s Up in Denver? December 15th through 21st, 2025

    Here’s a brief look at what’s going on in the Mile High City this week. December 15: Look for the Andromeda Galaxy (M31) at Zenith: In dark skies, this galaxy can be spotted with the naked eye. It’s a great

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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, which features its prized 1894 Alvan Clark-Saegmuller 20-inch refracting telescope. The Observatory serves as the DAS home base for numerous Astronomy Nights, Open Houses, and special events throughout the year.

Due to overwhelming demand, we are changing how we reserve our Astronomy Nights and adding more to the calendar. For details, see our Reservations page.

If you have any questions about EXISTING reservations or want to change your existing 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? Can you take similar images? You may 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