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? December 15th through 21st, 2025

Here’s a brief look at what’s going on in the Mile High City this week. December 15: Look for the Andromeda Galaxy (M31) at Zenith: In dark skies, this galaxy can be spotted with the naked eye. It’s a great target for binocular viewing especially when directly overhead: 7:05 PM Catch the waning Geminids meteor shower – even though it peaked on the evening of December 13/14, the Geminids should still put on a show of up to 50 meteors per hour under dark clear skies after midnight. December 16: Catch the waning crescent Cold Moon near Zubenelgenubi: Zubenelgenubi is…
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Get Ready for the Year’s Best Meteor Showers

The Geminids Meteor Shower 2025 If you watch only one meteor shower all year, make it the Geminids. This shower is predicted to be the strongest of 2025, producing plenty of bright, colorful meteors. With the Moon conveniently out of the way during peak nights, conditions will be near perfect. What is a Meteor Shower? Meteor showers happen when Earth plows through streams of dust and rock left in space by comets or asteroids. As the particles burn up in our atmosphere, we see them as streaks of light racing across the sky. Each shower is tied to a specific…
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What’s Up in Denver? December 8th through 14th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. December 8: Astronomy on Tap – Boulder with Dr. Mathias Nordvig, Dr. Lauren Blum, and Tiffiny Costello (Free in-person program):📍Rayback Collective: 6:00 PM SCFD Denver Museum of Nature and Science Free Day (Free in-person program):📍DMNS: 9:00 AM Look for the waning gibbous Cold Moon near the Beehive Cluster (the open star cluster, M44) in the constellation Cancer high in the southern sky: 4:00 AM December 9: Amateur Astronomers Association – Mars: where is the air? with Dr. Tim Livengood from the University of Maryland (Free…
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AL/NASA 35 Years of Hubble December Challenge

Last month, we discussed the Hubble’s Night Sky Observing Challenge and the November targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope. These organizations have announced a new set of targets for the month of December. Read on to find out more. Discover the Universe Like Hubble! Join the celebration of the Hubble Space Telescope’s 35th anniversary by participating in the Hubble’s Night Sky Observing Challenge! Equipped with a telescope, clear skies, and star charts, you can explore breathtaking nebulae and galaxies that Hubble has captured from space. A fresh list of…
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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.