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? March 10th through 16th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. March 10: Look for the waxing gibbous Worm Moon near the Beehive Cluster (M44) high overhead in Cancer around 10:00 PM. March 11: The Search for Interstellar Objects of Technological Origin (Free, Virtual Lecture from Hamptons Observatory) – 5:00 PM (Registration Required). Astronomical Observing 101 Class: 7:00 PM at Secular Hub Community Center (Registration is Sold Out). Astrophotography Special Interest Group (ASIG) – General Meeting for DAS Members: 7:00 PM (more info). March 12: Look for the waxing gibbous Worm Moon near Regulus high in…
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Get Ready to See the Zodiacal Light

What is Zodiacal Light? Zodiacal light is a faint, glowing band of light that stretches across the night sky. It looks like a soft triangle of light, and it appears along the path the Sun travels through the sky, known as the ecliptic. This light is not from stars, but from tiny particles of dust floating in space. These particles reflect sunlight, creating the glow we see. Sometimes, zodiacal light is called the “false dawn” in the morning, the “false dusk” in the evening, or sometimes “the evening twilight glow.” It is usually most noticeable when the sky is very…
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Counting Frogs and Looking at Stars in Douglas County

Acoustic Monitoring Scientists have developed clever ways to study wildlife without disturbing them. One such method is called acoustic monitoring, which is used to estimate the population of amphibians, like frogs, in the wild. Instead of capturing or counting them one by one, researchers perform manual calling surveys (MCS). During these surveys, scientists listen for the calls of male frogs, which are most vocal during breeding season. By analyzing these calls, they can estimate the number of frogs in an area. But what does this have to do with astronomy? Counting Frogs in Douglas County In 2019, Dr. Doug Reagan,…
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AL/NASA 35 Years of Hubble March Challenge

Last month, we discussed the Hubble’s Night Sky Observing Challenge and the February targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope. These organizations have announced a new set of targets for the month of March. Read on to find out more. 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…
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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.