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? January 19th through 25th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. January 19 (Martin Luther King Jr. Day): Celebrating the legacy of the Reverend Dr. Martin Luther King, Jr. January 20: Catch Jupiter within half a degree of Wasat: Delta Geminorum, the third-brightes star in the constellation Gemini, is a bright triple star system whose name means “middle” in Arabic, reflecting its position in the middle of the body of the eastern twin, Pollux: Find it and the gas giant in the eastern sky just after sunset. January 21: DAS Astrophotography Special Interest Group (ASIG) –…
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What’s Up in Denver? January 12th through 18th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. January 12: DAS General Meeting: Nominations of Officers (Free in-person meeting): 📍Secular Hub: 7:00 PM January 13: The waning crescent Wolf Moon reaches apogee, its farthest from Earth at 405,438km: 2:00 PM January 14: Catch the waning crescent Wolf Moon near Antares, the bright red alpha star in the constellation Scorpius low in the eastern sky around 5:30 AM January 15: Standley Lake Stargazing (Free virtual program): Online via Zoom: 6:00PM January 16 (Dark Sky Weekend): Check out the Great Red Spot of Jupiter, with…
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Chimney Rock National Monument Achieves Dark Sky Park Certification

A New Chapter for an Ancient Landscape Chimney Rock National Monument is best known for its dramatic twin stone spires and its deep cultural significance to the Ancestral Puebloan people. The site was designated a National Monument in 2012 by President Barack Obama, ensuring long-term protection of both its archaeological treasures and its natural environment. Now, Chimney Rock has earned another distinction: it has been officially designated as an International Dark Sky Park, recognizing its commitment to preserving the night sky. This certification highlights not only the monument’s stunning daytime scenery and history, but also the exceptional darkness that descends…
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What’s Up in Denver? January 5th through 11th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. January 5: Look for the shadow transit of Io across Jupiter’s face followed closely by the moon itself. With Jupiter close to its opposition on January 10th, Jupiter’s moons and their shadows cross the planet very close together. Look for Io’s shadow to appear at 18:53, Look for the moon itself to begin its transit at 19:07 and end at 21:09, and look for Io’s shadow to disappear at 21:11. January 6: Catch the waning gibbous Wolf Moon next to Regulus, the brightest star in…
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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.