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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Trustee Emeritus Jack Eastman: More Than Half a Century with DAS

During the Open House on May 23, 2026, at Chamberlin Observatory, longtime Denver Astronomical Society member Jack Eastman was honored with special recognitions celebrating his decades of service to astronomy and to the Society. Since Jack was unable to attend the DAS Spring Banquet earlier this year, the Open House became an opportunity to formally present him with the Society’s Trustee Emeritus Award, recognizing more than half a century of leadership, outreach, and dedication to amateur astronomy. Jack was also recognized as an outgoing Executive Board Trustee with a commemorative plaque and received an autographed photo from University of Denver…
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What’s Up in Denver? June 1st through 7th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. June 1: 🌖 The waning gibbous Strawberry Moon reaches Apogee, it’s farthest distance from the earth in its orbit at 406,369 km at 04:32 AM UTC June 2: 👀 Look for Jupiter, Venus, and Mercury dancing around the twins of Gemini low in the western sky just after sunset. 🔭 Catch Messier 13, the Great Globular Cluster in Hercules as it reaches its highest point in the sky at around midnight. June 3: 🖥️ Astrophotography Special Interest Group (ASIG) – General & Beginner Meeting: Free,…
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What’s Up in Denver? May 25th through 31st, 2026

Here’s a brief look at what’s going on in the Mile High City this week. May 25 (Memorial Day): 👀 Look for Mars and Saturn, these two planets grace the morning sky low in the east in the constellation Pisces just before sunrise at 4:45 AM. May 26: 🖥️ NSN Webinar Series: Moon Joy: Science from Artemis II with Dr. Ryan Watkins: FREE, virtual event via YouTube: 7:00 PM 👀 Look for the waxing gibbous Strawberry Moon near Spica, the bright star in the constellation Virgo in the southern sky around 10:00 PM May 27: 🎤 60 Minutes in Space with…
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What’s Up in Denver? May 18th through 24th, 2026

Here’s a brief look at what’s going on in the Mile High City this week. May 18: 👀 Look for the waxing crescent Strawberry Moon next to Venus, the “evening star” on the border of Taurus and Gemini low in the western sky just after sunset. 📝 DAS E-Board Meeting: Member only, virtual event via Zoom (check membership email or slack to join): 7:00 PM 🪐 Mercury reaches Perihelion, it’s closest point to the sun in its orbit around it: 4:00 AM May 19: 🖥️ Space Telescope Science Institute: Big Black Holes, Bigger Problems — Mysteries from the Dawn 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.