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.


  • Astro Update – December

    Astronomy and space news summarized by Don Lynn from NASA and other sources Neutron Star Found – In 1987, astronomers witnessed the nearest supernova in hundreds of years explode in the nearby dwarf galaxy known as the Large Magellanic Cloud. … Read More

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  • The FrankenScope: How To Build Your Own Schmidt-Cassegrain And Why Not To

    By Donald S. Lynn How To Build It More than 30 years ago I was attending the Riverside Telescope Makers Conference and Celestron was selling scrapped telescope parts at their booth. They were probably cleaning out their factory of stuff … Read More

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  • Astro Update – November

    Astronomy and space news summarized by Don Lynn from NASA and other sources Physics Nobel Prize – Because the Nobel Prizes do not have a category strictly for astronomy, astronomers whose work merits the honor are awarded the Physics Nobel. … Read More

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  • The Sounds of Awe

    By Mark Laurin Mark Laurin is an amateur astronomer, a member of the Denver Astronomical Society for more than 15 years and has been active in astronomy outreach in the communities around Summit County since 2014. Here he shares what … 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