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.


  • May 2019 Skies

    by Zachary Singer Along with the planets this month, we’ve got two targets in the constellation Canes Venatici—one is a sun-like star, and the other a bright spiral galaxy. Let’s get going… The Solar System Mercury starts May as a … Read More

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  • April 2019 Skies

    by Zachary Singer For April, we’re looking at a beautiful binary in Leo, and some galaxies in a tight grouping—but perhaps not the one you’re guessing! First, though, we have the planets…. The Solar System Technically, Mercury will be up … Read More

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  • President’s Message, April 2019

    Volunteerism by Ed Ladner First, let me express my appreciation to all the DAS members who participated in the most recent elections. Without your support, this Society could not exist.   I’d like to talk with you about volunteerism—the only … Read More

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  • Astro Update, April 2019

    Selected Summaries of Space News by Don Lynn Asteroid Sampled Hayabusa2 (a Japanese spacecraft) has touched down on its target, the asteroid Ryugu, and completed a procedure to fire a projectile into it and collect the debris blown off. Another … 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