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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DAS announces Astronomical Observing 101 Program

Discover the Night Sky with the Denver Astronomical Society! The Denver Astronomical Society (DAS) is excited to announce its Astronomical Observing 101 program for members! This seven-night series is perfect for anyone who wants to learn how to explore the night sky, whether with just their eyes, binoculars, or a telescope. Classes will occur on Tuesday nights from March 11 to April 22. For time and location details, log into the Member Portal. What Will You Learn? Each session will focus on a different aspect of astronomy, helping you build skills and confidence in observing the night sky. Here’s a…
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Colorado Expands Dark Sky Certification Program to More State Parks

Colorado is taking big steps to protect its starry night skies while boosting tourism and education. The state’s new Dark Sky Certification program, announced by Gov. Polis, Colorado Parks and Wildlife (CPW), and the Colorado Tourism Office (CTO), aims to reduce light pollution in twelve state parks. These efforts not only enhance stargazing opportunities but also promote off-season travel and highlight hidden gems in rural communities. Under this initiative, the participating parks will collaborate with DarkSky Colorado to work toward International Dark Sky Place (IDSP) certification. This includes receiving consulting support, sky quality meter equipment, and guidance on creating…
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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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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.