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.

September

5:00 pm - 10:00 pm

Open House – International Observe the Moon Night, Saturn & Neptune!

Looking for a FREE fun family activity? Join the Denver Astronomical Society for a special International Observe the Moon Night Open House at Denver University’s historic Chamberlin Observatory. International Observe the Moon Night is a worldwide celebration of our nearest celestial … Read More ...

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What’s Up in Denver? September 14th through 20th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. September 14: DAS General Meeting: “A Graphical Tour of the Cosmos”w/ Dr. Ed Friedman: Free, in-person event at Secular Hub: 7:00PM Check out the waxing crescent Harvest Moon near Venus: low in the western sky in the constellation Virgo just after sunset at 8:00PM September 15: On September 15, 1966: Gemini 11 returned to Earth after a three-day mission that included rendezvous and docking with an Agena target vehicle and two spacewalks. The mission also carried several astronomical experiments, including ultraviolet and “dim sky” photography.…
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DAS Astrophotography Gallery for September 2026

The Denver Astronomical Society Astrophotography Special Interest Group (ASIG) July Member Gallery Each month, the Astrophotography Special Interest Group (ASIG) of the Denver Astronomical Society gathers to share one of the most inspiring parts of our hobby—the images we’ve captured of the night sky. From stunning galaxies and colorful nebulae to detailed views of the Moon and planets, members present their latest work, talk through how the images were created, and exchange tips, techniques, and stories from behind the lens. It’s a chance to celebrate progress, learn from one another, and stay motivated under the stars. Roger Clark August…
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What’s Up in Denver? September 7th through 13th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. September 7: Look for the waning crescent Stergeon Moon making a line with Castor and Pollux and Mars nearby in the constellation Gemini low in the eastern skies around 3:00AM until dawn. September 8: Catch the waning crescent Sturgeon Moon in between the Beehive Cluster (M44) and Jupiter in the constellation Cancer low in the eastern skies around 4:15AM until dawn September 9: Look for the tiny waning crescent Sturgeon Moon near Regulus at the end of the sickle asterism in the constellation Leo…
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What’s Up in Denver? August 31st through September 6th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. August 31: Look for the waning gibbous Sturgeon Moon near Saturn low in the eastern sky in the constellation Pisces around 10:30PM September 1: Catch Venus right next to Spica. Look for the bright evening star, Venus, within about a degree of the alpha star of Virgo low in the western sky just after sunset: 8:15PM The Aurigid meteor shower peaks. This annual meteor shower caused by the debris left behind by Comet C/1911 N1 should bring about 6 meteors per hour tonight radiating near…
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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.