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? February 2nd through 8th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. February 2: Catch the waning gibbous Snow Moon near Regulus and the Sickle Asterism: look for the moon to add to the already bright alpha star In the constellation Leo at the tip of the backward question mark that is known as the Sickle asterism in the eastern skies around 8:00 PM. Earlier in the evening between 6:40 and 7:34 PM, the Moon will pass in front of Regulus, creating a lunar occultation. February 3: The waning gibbous Snow Moon reaches its Descending Node, as…
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What’s Up in Denver? January 26th through February 1st, 2026

Here’s a brief look at what’s going on in the Mile High City this week. January 26: DAS E-Board Meeting: Members’ only virtual event (Check Slack and membership email for details): 7:00 PM January 27: Catch the Moon next to the Pleiades, a bright, easily visible open star cluster in the constellation Taurus, also known as Messier 45, or the Seven Sisters. 7:00 PM January 28: DMNS: 60 Minutes in Space with Dr. KaChun Yu, DMNS Curator Space Sciences: Free in-person program at📍Denver Museum of Nature and Science: 7:00 PM January 29: Standley Lake Stargazing: Artemis II – To the…
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January Open House Canceled Due to Weather

Unfortunately, this weekend’s Denver Astronomical Society Open House, scheduled for Saturday, January 24, has been canceled due to weather. The forecast is calling for bitterly cold temperatures along with snow Friday night into Saturday, creating conditions that aren’t safe or comfortable for our volunteers or visitors. While we never like to cancel an event, the safety of our community always comes first. We’ll See You in February🤞! The good news? Open Houses happen every month, and we look forward to welcoming everyone back in February. DAS Open Houses take place at dusk on the south lawn of DU’s historic Chamberlin…
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Green Bank Star Quest XXI: Where Optical and Radio Astronomy Meet

If you’re looking for a truly unique astronomy experience, Green Bank Star Quest XXI deserves a spot on your observing calendar. Held July 15–18, 2026, this four-day event is the largest star party in the nation that combines both optical and radio astronomy, bringing amateur astronomers together at one of the most iconic astronomy sites in the world. Hosted by the Central Appalachian Astronomy Club, Green Bank Star Quest takes place at the Green Bank Observatory in rural West Virginia, an area famous for its exceptionally dark skies and its location within the National Radio Quiet Zone. What Is Green…
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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.