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 - 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 3rd through 9th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. February 3: Look for the Winter Hexagon high in the southern skies throughout February. This asterism is formed by connecting six bright stars: Sirius in Canis Major (the brightest star in the sky), Rigel in Orion, Aldebaran in Taurus, Capella in Auriga, Pollux in Gemini, and Procyon in Canis Minor. This dazzling pattern is a gateway to exploring fascinating celestial objects, like the Orion Nebula near Rigel and the star clusters surrounding Aldebaran. The Moon is at perigee (it’s closest distance to Earth at 367,457km)…
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AL/NASA 35 Years of Hubble February Challenge

Last month, we discussed the Hubble’s Night Sky Observing Challenge and the January targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope 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 targets is released every month in 2025, inviting stargazers from around the globe to seek out these incredible sights. Take…
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Where to Explore the 2025 Denver Night Skies

This is the third installment of a three-part series exploring the wonders of Denver’s night skies. Be sure to check out the other articles in the series: What to Explore in the 2025 Denver Night Skies and When to Explore in the 2025 Denver Night Skies. The Mile High City offers some incredible opportunities for stargazing and astronomical observation. Whether you’re a seasoned astronomer or just beginning to explore the wonders of the night sky, this guide will help you find the perfect spot. From the comfort of your own backyard to some of the best dark-sky locations in Colorado,…
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When to Explore the 2025 Denver Night Skies

In our previous article, we spoke in depth about the variety of celestial objects that you can observe in the 2025 Denver night skies. If you’re planning to stargaze in Denver, knowing when to look up is just as important as knowing what to look for. Here, we’ll break down when you should plan to look at these objects. Barring clear skies and cooperative weather, planning when to view an astronomical object or celestial event can typically depend on one or more factors: the phase of the moon, the position of the bodies in our solar system, and the seasonal…
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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.