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? April 14th through 20th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. April 14: DAS General Membership Meeting – Dr. Winston Pendleton, retired educator, scientist, and researcher will speak to DAS members about Gaia- ESA’s Billion-Star Surveyor at Regis University’s Peter Claver Hall, Room 328. 7:00PM April 15: Astronomical Observing 101 Class: 7:00 PM at the Chamberlain Observatory (Registration Required). Astrophotography Special Interest Group (ASIG) – General Meeting for DAS Members: 7:00 PM (more info). April 16: Look for the waning Pink Gibbous Moon near Antares in the constellation Scorpius in the early morning around 2:30 AM. April…
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What’s Up in Denver? April 7th through 13th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. April 7: Look for the Waxing Pink Moon within a couple degrees of Regulus in the constellation Leo high in the southern sky. Regulus (Alpha Leonis) is the brightest star in the constellation Leo and the 21st brightest star in the night sky. It’s part of a multiple-star system who’s name means “little king.” April 8: Astronomical Observing 101 Class: 7:00 PM at the Chamberlain Observatory (Registration Required). Astrophotography Special Interest Group (ASIG) – General Meeting for DAS Members: 7:00 PM (more info). Conjunction of Venus,…
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Get Ready for the April Lyrid Meteor Shower

The April Lyrids Every April, the night sky lights up with a dazzling display of shooting stars during the Lyrid meteor shower. The Lyrids get their name because they seem to radiate from the constellation Lyra, which contains the bright star Vega. The Lyrids are one of the oldest recorded meteor showers, with observations dating back to at least 687 BCE by Chinese astronomers. Ancient Chinese texts described the shower as “falling stars like rain,” giving us a glimpse of how spectacular this event has been for centuries. What is a Meteor Shower? When you see a shooting star streak…
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April’s Night Sky Notes: Catch the Waves!

This article is distributed by NASA’s Night Sky Network (NSN). The NSN program supports astronomy clubs across the USA dedicated to astronomy outreach. Visit nightsky.jpl.nasa.gov to find local clubs, events, and more! By Kat Troche The Electromagnetic Spectrum If you’ve ever heard the term “radio waves,” used a microwave or a television remote, or had an X-ray, you have experienced a broad range of the electromagnetic spectrum! But what is the electromagnetic spectrum? According to Merriam-Webster, this spectrum is “the entire range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves and…
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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.