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.

July

8:30 pm - 10:30 pm

Open House Star Party at Chamberlin Observatory

Looking for a FREE fun family activity? Join the Denver Astronomical Society for our monthly Open House on Saturday, July 18th, at dusk. This event will take place on the south lawn of DU’s historic Chamberlin Observatory, located at 2930 … Read More ...

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DAS Member Leah Theil Earns Two Honors in the Williamina Fleming Imaging Award Contest

Congratulations to Denver Astronomical Society member Leah Theil, who earned recognition in two categories of the prestigious Williamina Fleming Imaging Award Contest. Leah has been named Runner-Up in the Solar System Imaging (>500 mm) category and Third Place in the Rich Field Imaging (201–500 mm) category, an impressive achievement that showcases both her technical skill and artistic eye. From First Dark Sky to Award-Winning Images Leah has been a member of the Denver Astronomical Society since 2022, but her astrophotography journey began several years earlier. “I started with astrophotography in 2016 after visiting a dark site for the very first…
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What’s Up in Denver? July 13th through 19th, 2026

Look Here’s a brief look at what’s going on in the Mile High City this week. July 13: Look for Mars next to Aldebaran, the red planet meets up with the red giant alpha star of Taurus in the eastern skies around 3:30AM. Mercury at inferior conjunction with the Sun at 1h UT. The innermost and most elusive planet passes into the morning sky. The waning crescent Strawberry Moon reaches perigee, it’s closest distance to Earth at 359,112km at 1:57AM July 14: The new Buck Moon reaches perihelion: The Moon’s monthly orbit around the Earth will carry it to its closest…
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DAS Astrophotography Gallery for July 2026

The Denver Astronomical Society Astrophotography Special Interest Group (ASIG) July Member Gallery Each month, the Astrophotography Special Interest Group (ASIG) of the Denver Astronomical Society gathers to share one of the most inspiring parts of our hobby—the images we’ve captured of the night sky. From stunning galaxies and colorful nebulae to detailed views of the Moon and planets, members present their latest work, talk through how the images were created, and exchange tips, techniques, and stories from behind the lens. It’s a chance to celebrate progress, learn from one another, and stay motivated under the stars. Ciaran Rochling Milky…
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What’s Up in Denver? July 6th through 12th, 2026

Look Here’s a brief look at what’s going on in the Mile High City this week. July 6: Earth reaches Aphelion, its farthest distance from the Sun) at 1.016644 AU (152.1M km): 11:00AM July 7: 🌗 The last-quarter Strawberry Moon reaches Descending Node, when it moves from north to south of the Earth’s plane in its orbit around the sun: 5:22AM 🪐 Neptune enters retrograde motion: the ice giant haults its usual eastward movement through the constellations, and turning to move westwards instead. This reversal of direction is a phenomenon that all the solar system’s outer planets periodically undergo, a…
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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.