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? March 30th through April 5th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. March 30: The waxing gibbous Pink Moon reaches Descending Node, when it moves from north of the ecliptic to south of it, crossing the plane of Earth’s orbit around the Sun: 4:34 AM March 31: Check out the transit of Io’s shadow across the face of Jupiter, looking at Jupiter right as the sun is setting, Io is just finishing it’s transit in front of the gas giant high overhead in the constellation Gemini, but it shadow will remain on its face from sunset until…
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Artemis II: Humanity Returns to the Moon

On April 1, 2026—yes, really, April Fool’s Day—NASA is scheduled to launch astronauts toward the Moon for the first time in 54 years. The last time humans left low Earth orbit was during Apollo 17 in 1972. Since then, we’ve built space stations, launched telescopes, and sent robots across the solar system—but we haven’t sent people back to deep space. That’s about to change. What Is the Artemis Program? The Artemis program is NASA’s plan to return humans to the Moon—and this time, to stay. Named after Artemis, the twin sister of Apollo, the program connects past and future. The…
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Our Most Important Roles in the Denver Astronomical Society

Written by DAS Member, Volunteer, and Former President, Dena McClung Many of you longer-term members know I have served in a variety of roles with the DAS, and some of you newer members know me because I’ve answered questions that you sent to us via email. It’s been nearly 18 years since I joined the society, and during that time, I’ve worn many hats: 20” telescope operator, Astronomy Night presenter, secretary, vice president, president, membership coordinator, organizer of the events at Sandstone Ranch, and a few others. The term I use most often when describing myself is “Volunteer.” The DAS…
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What’s Up in Denver? March 23rd through 29th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. March 23: Look for the waxing crescent Pink Moon above to the Pleiades and Aldebaran: see the bright open cluster (M45) along with red eye of the bull alpha star and the ice giant Uranus in the constellation Taurus in the west around 10:00 PM. DAS E-Board Meeting: Members only meeting via Zoom (check membership email for more details): 7:00 PM March 24: Northern Colorado Astronomical Society: Greeley Star Party : Free in-person event at Poudre Learning Center: 8:00 PM Look for the waxing crescent…
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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.