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.

June

8:30 pm - 8:30 pm

Open House

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? May 11th through 17th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. May 11: 🌘 The waning crescent Flower Moon reaches Ascending Node, as it crosses the ecliptic plane moving from south to north of Earth’s orbital plane around the Sun.: 4:36 AM UTC May 12: 🖥️ Amateur Astronomers Association: SPHEREx: NASA’s New Explorer of the Universe with Fynn Janssen from Caltech: Free, virtual event via Zoom (registration required): 5:00 PM 🔭 Messier 5, the globular cluster in the constellation Serpens, reaches it’s highest point in the night sky at 1:00 AM. May 13: 🔭 Dark Skies…
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What’s Up in Denver? May 4th through 10th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. May 4: 🎤 DAS General Meeting – Give Peas a Chance: How Citizen Scientists Helped Solve the Photon Crisis with Dr. Donal O’Sullivan: Free, in-person event at Secular Hub: 7:00 PM 🌖 The waning gibbous Flower Moon reaches apogee, it’s farthest point in its orbit from the earth at 405,843 km. May 5 (Cinco de Mayo): 🇲🇽 ¡Feliz Cinco de Mayo de parte de la Denver Astronomical Society! May 6: 👀 Look for the waning gibbous Flower Moon in the Tea Pot asterism in the…
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What’s Up in Denver? April 27th through May 3rd, 2026

Here’s a brief look at what’s going on in the Mile High City this week. April 27: 🖥️ DAS E-Board Meeting: Members’ Only virtual event via Zoom (check Slack and membership email for details): 7:00 PM April 28: 🖥️ NASA Night Sky Network Webinar: Dragonfly: NASA’s Mission to Titan with Dr. Jason W. Barnes: FREE virtual program via YouTube: 7:00 PM April 29: 👀 Check out the waning gibbous Flower Moon next to Spica, the ear of wheat held by the virgin Virgo high in the southeastern sky around 8:45 PM. April 30: 🖥️ Standley Lake Stargazing: Weekly Livestream: Free Online…
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Introducing the Scientific Special Interest Group (SSIG)

Not every astronomer is drawn primarily to beautiful views or finished images. For some, the real excitement lies in what can be measured, compared, tracked, and learned from the night sky over time. The Scientific Special Interest Group (SSIG) was created to give that curiosity a home. SSIG focuses on scientific measurement, analysis, and broader astronomy topics driven by member interest. While this path overlaps with astrophotography in practical ways, its purpose is different. The goal is not simply to create a beautiful image—it’s to use observations, images, and data to ask meaningful questions and discover something new. That might…
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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.