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.


  • Don’t Be a Party Pooper: The Essential Guide to Astronomical Star Parties

    This article is based on the “Star Party Preparation and Etiquette” post on Cloudy Nights by DAS Member and Trustee, Joe Gafford. What’s a Star Party? A star party is a gathering of astronomy enthusiasts who come together to observe … Read More

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  • What’s Up in Denver? March 31st through April 6th, 2025

    Here’s a brief look at what’s going on in the Mile High City this week. March 31: Look for the Spring Triangle asterism around midnight, which is now visible to the south as the constellations of Leo, Virgo, and Boötes … Read More

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  • AL/NASA 35 Years of Hubble April Challenge

    Last month, we discussed the Hubble’s Night Sky Observing Challenge and the March targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope. These organizations have announced a new set of targets for … Read More

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  • What’s Up in Denver? March 24th through 30th, 2025

    Here’s a brief look at what’s going on in the Mile High City this week. March 24: Mercury at inferior conjunction with the Sun at 1:00 PM. The innermost planet passes into the morning sky. DAS E-Board Meeting – 7:00 … 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, 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