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 ...

View Detail

Are We Alone in the Universe? Join the Search with NASA’s Citizen Science Program

Over the past few months, we’ve explored how anyone can join NASA’s Citizen Science program to classify distant galaxies, track Martian clouds, and discover active asteroids. Now, we turn to one of the most profound questions in science: Are we alone in the universe? Thanks to a partnership between NASA, UCLA SETI, and The Planetary Society, you can help scientists search for signs of intelligent life beyond Earth—right from your laptop. What is “Are We Alone in the Universe?” This citizen science project invites the public to help search for extraterrestrial intelligence (SETI) by analyzing signals from space. It’s a…
Click here to read more
What’s Up in Denver? June 23rd through 29th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. June 23: Look for the waning crescent Strawberry Moon near the Pleiades low in the eastern skies in Taurus before sunrise. The Pleiades, also known as Messier 45 (M45), is a bright open star cluster that is easily visible to the naked eye and often mistaken for a tiny dipper. The Moon reaches perigee – it’s closest to Earth at 363,178km at 1:46 AM DAS E-Board Meeting (virtual on Zoom) – 7:00 PM (more info) June 24: Jupiter will be directly behind the Sun today…
Click here to read more
What’s Up in Denver? June 16th through 22nd, 2025

Here’s a brief look at what’s going on in the Mile High City this week. June 16: Look for Mars within a degree of Regulus in the southwestern skies – Mars, the red planet glowing with its distinctive rusty hue, and Regulus, the brightest star in the constellation Leo and known for its bluish-white color. will be easily seen with the naked eye, through binoculars, or in a single low-powered eyepiece through a telescope. Look for them at the base of the Sickle asterism in Leo in the western skies after the sun has set. Titan Shadow Transit across the…
Click here to read more
What’s Up in Denver? June 9th through 15th, 2025

Here’s a brief look at what’s going on in the Mile High City this week. June 9: DAS General Meeting: “Alunite in Cross Crater, Mars: Evidence for a Possible Site of Ancient Life” presented by Dr. Tony Ranalli and Dr. Gregg Swayze: 7:00 PM at Regis University’s Peter Claver Hall, Room 328 (or on Zoom) June 10: Look for the waxing gibbous Strawberry Moon right next to Antares — “the rival of Mars” — a bright red supergiant star in the heart of the constellation Scorpius Astrophotography Special Interest Group (ASIG) – General Meeting for DAS Members: 7:00 PM…
Click here to read more

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.