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? March 16th through 22nd, 2026

Here’s a brief look at what’s going on in the Mile High City this week. March 16: The Moon reaches perihelion: The moon’s closest point to the Sun in its orbit around earth at a distance of 0.9810 AU:. 2:07 AM March 17 (St Patrick’s Day): Look for a tiny sliver of a waning crescent Snow Moon next to Mercury to the east in the morning sky in the constellation Aquarius just before sunrise: 6:40 AM March 18: Boulder OSMP Dark Skies & Deep Space: Spring Prelude, Venus & The Crescent Moon: Free in-person stargazing at Beech Shelter (registration required): 7:00…
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The 2026 Spring Banquet: Celebrating the People Who Make DAS Shine

On the evening of March 7, 2026, members of the Denver Astronomical Society gathered at the beautiful Deer Creek Stables at Denver Botanic Gardens Chatfield Farms in Littleton for the annual DAS Spring Banquet. The event brought together members, volunteers, and leaders to celebrate another year of accomplishments and recognize the people who make the organization thrive. The banquet began with guests arriving and enjoying conversation before sitting down for a buffet dinner, giving everyone a chance to catch up with fellow members and share stories from star parties, outreach events, and observing sessions throughout the past year. While DAS…
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Old Snowmass Earns International Dark Sky Community Certification

Colorado’s list of places protecting the night sky continues to grow. The rural community of Old Snowmass has officially been designated an International Dark Sky Community by DarkSky International, recognizing years of local work to reduce light pollution and preserve the natural beauty of the night. Located in the Roaring Fork Valley between Aspen and Basalt, Old Snowmass is known for its wide open landscapes, ranching heritage, and expansive mountain views. Now it is also known as one of Colorado’s newest places committed to protecting the starry skies above. What Is a Dark Sky Community? The International Dark Sky Places…
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Zodiacal Light Season is Here

What is Zodiacal Light? Zodiacal light is a faint, glowing band of light that stretches across the night sky. It looks like a soft triangle of light rising up from the horizon. This glow appears along the path the Sun travels through the sky, called the ecliptic. The light doesn’t come from stars. Instead, it comes from sunlight reflecting off tiny dust particles floating in space throughout our solar system. These particles are about the size of cigarette smoke and come from things like comets shedding material and collisions between asteroids. Because this dust lies in the same flat plane…
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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.