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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What’s Up in Denver? August 3rd through 9th, 2026

Look Here’s a brief look at what’s going on in the Mile High City this week. August 3: Look for the waning gibbous Buck Moon near Saturn: Find our satellite next to the ringed gas giant in the constellation Pisces in the easter sky around 11:30PM Comet 10P/Tempel reaches peak brightness in the constellation Capricornus low in the southeastern skies after 1:00 AM August 4: This Week in Astronomy History – August 4, 1972: One of the most intense solar storms ever recorded struck Earth on August 4, 1972. The coronal mass ejection traveled from the Sun to Earth in just…
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The Moon, a Pond in France, and My Grandfather: Skyward for August 2026

As a child I always treasured a close relationship to my Dad’s father, whom I loved to call Grampa (misspelling deliberate) Willie. Our closeness began during a visit in 1959 or 1960, when we both took his apartment building elevator to the roof. On that unforgettable evening we both looked through binoculars at the Sun, which had not quite set. There and then we enjoyed a large group of sunspots on the Sun. A few years later, when he was away from his apartment, I went again to that roof to look for Comet Ikeya-Seki, the Great Comet of 1965. …
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What’s Up in Denver? July 27th through August 2nd, 2026

Look Here’s a brief look at what’s going on in the Mile High City this week. July 27: DAS E-Board Meeting: Free, member’s only virtual meeting via Zoom (look for details in the membership email and Slack): 7:00PM Find Pluto at opposition, the distant dwarf planet will be exactly between the earth and the sun, making it slightly brighter than usual. Find it n the constellation Capricornus. after 1:00AM July 28: NASA Night Sky Network: International Observe the Moon Night 2026 Preparation Webinar: Free, virtual event via YouTube: 7:00PM July 29: DMNS: 60 Minutes in Space with Dr. KaChun…
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What’s Up in Denver? July 20th through 26th, 2026

Look Here’s a brief look at what’s going on in the Mile High City this week. July 20: 👀 Look for the waxing crescent Buck Moon near Spica – the almost quarter Moon cozies up to the bright alpha star in the constellation Virgo low in the western sky around 10:00PM July 21: 🖥️ Space Telescope Science Institute: Into the Deep and Beyond: Webb’s First Four Years with Dr. Macarena Garcia Marin of STScI and ESA: Free, virtual event via YouTube: 4:00PM 🌓 First quarter Buck Moon: 5:05AM July 22: 🔭 Look at the features of the 8-day-old Buck Moon. If…
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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.