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.

August

8:00 pm - 10:30 pm

Open House Star Party at Chamberlin Observatory

Looking for a FREE fun family activity? Join the Denver Astronomical Society for our monthly Open House Saturday night at dusk. This event will occur on the south lawn of DU’s historic Chamberlin Observatory, 2930 E. Warren Avenue, Denver. Weather … Read More ...

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It is with heartfelt sadness that we report the passing of longtime DAS member John Anderson

John Edgar Anderson February 23,1938 – May 4, 2023 It is with heartfelt sadness that we report the passing of longtime DAS member John Anderson, who specialized in solar astronomy and spectroscopy. John Edgar Anderson, 85, of Nederland, CO, passed away on May 4, 2023 at Boulder Community Hospital. John was born on February 23, 1938 in Ridgewood, New Jersey to Edna (Camp) and George Anderson. He attended schools in Ridgewood and graduated from Ridgewood High School before attending Clarkson University in Potsdam, New York earning his BS in Physics. He then married and began his career in…
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For the Record

By Daniel Acker I’m not sure if this is a little “old school” or not but, I have kept observation logs since the early 1980’s and I’ll look back through them from time to time and recall some interesting things that happened while observing on a particular night or compare how improved my observing skills have become or even how improved telescopes have become since those early days as a backyard astronomer. So, let me ask you this question; do you keep an observation logbook? I hope you answered yes to this question because it really does help you to…
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Tour the Universe with Dean Regas

In case you missed it, Dean Regas, astronomer at the Cincinnati Observatory, held a webinar recently giving a tour of the universe! It was a tour of everything that we’ve seen so far, and Dean’s goal was to fill everyone with anticipation of what is yet to be discovered. So, discover for yourself the vastness of our universe with his guided tour. You can find the recording below. https://drive.google.com/file/d/1pwS7wnYB6exC7fHOyuF_e5l6PlkB8h7T/view The software he used is called Mitaka and is free to download and use for PCs (not Macs unfortunately) at: https://4d2u.nao.ac.jp/html/program/mitaka/index_E.html The next online class from the Cincinnati Observatory will be…
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Newton’s Astronomy Proof

By Peter Higgins, PhD Isaac Newton lived from 1642 (the year Galileo died) until 1727. He was considered both the first of the age of reason, joining the likes of Laplace, and the last of the alchemists-astrologers who bedazzled Europe’s royalty.1 He was a lonely figure, and a mystic, envied by many. Especially Robert Hooke, who tried to claim credit for much of Newton’s work. Newton’s greatest contribution however, and one that was his own work, was his proof describing the orbit of Mars that won the Wren prize2 enabling astronomy to be viewed as a secular science. Science in…
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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.