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? 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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  • Common Asterisms in the Denver Night Sky

    What are Asterisms? At a recent Denver Astronomical Society (DAS) Astronomical Observing 101 class, some students were surprised when the instructor, former DAS Vice President, Dr. Mehmet Unsoy, told them that the Big Dipper is not actually a constellation. Instead, … Read More

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  • Make Your Telescope Smart for Free!

    The Mighty Reflector If you’re just starting out in astronomy, chances are someone has recommended a reflector telescope — and likely it was a Dobsonian. Dobsonians are a type of reflector telescope that uses a simple mount to operate and … Read More

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  • The 2025 DAS Spring Banquet, Election, Awards, and Presentation

    Annual Spring Banquet Every year in mid-March, the Denver Astronomical Society (DAS) gathers for its Annual Spring Banquet. This special event is a time to celebrate the Society’s accomplishments, welcome newly elected board members and trustees, and honor dedicated members … 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 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 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