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? July 28th through August 3rd, 2025

Here’s a brief look at what’s going on in the Mile High City this week. July 28: Catch the waxing crescent Sturgeon Moon near the red planet Mars low in the constellation Virgo in the western sky after sunset. Moon reaches its Descending Node as it crosses the earth’s orbital plane from north to south. 2:30 AM DAS E-Board Meeting: Check your membership email for a Zoom link: 7:00PM July 29: Southern Delta Aquarid meteor shower peaks (about 15 to 20 per hour) after midnight appearing to radiate from the constellation Aquarius in the early morning southern skies. Rocky Mountain National…
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Patrol the Stars: Join the Eclipsing Binary Patrol

Over the past few months, we’ve explored some of the most engaging ways to get involved in NASA Citizen Science, spotlighting projects like Galaxy Zoo (now with JWST data!), Cloudspotting on Mars, Active Asteroids, Are We Alone in the Universe?, ExoAsteroids, and Backyard Worlds: Planet 9. Each one has invited us to be part of real scientific discovery, using our curiosity—and often nothing more than a web browser—to contribute directly to NASA’s missions. In this final post in our series, we’re turning our attention to one more stellar opportunity: the Eclipsing Binary Patrol. This project gives volunteers a chance to…
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Catch a Summer Sky Show: The Delta Aquariid Meteor Shower

Meteor Shower – Photo by DAS Member Bart Scully What Is a Meteor Shower? Meteor showers happen when Earth passes through a trail of debris left by a comet or asteroid. These tiny bits of rock and dust enter our atmosphere and burn up, creating bright streaks of light across the night sky. We call these “shooting stars,” but they’re actually small space particles meeting their fiery end high above us. What Causes the Delta Aquariids? This shower comes from debris left behind by Comet 96P/Machholz. As Earth moves through this trail each year, the bits of dust and rock…
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What’s Up in Denver? July 21st through 27th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. July 21: Catch the waning crescent Buck Moon near “the morning star” Venus low in the early morning eastern sky July 22: NSN Webinar Series: Lucy Mission: An Asteroid Investigation with Alena Gavrilenko: Youtube Livestream or Zoom (registration required): 7:00 PM Catch the waning crescent Buck Moon near M35 – the Shoe-Buckle Cluster low in the eastern skies in Gemini before sunrise. July 23: Look for the last sliver of the waning crescent Buck Moon to cozy up next to the big gas giant Jupiter low in the early morning…
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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.