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

Is Betelgeuse Going to Explode?

What is Betelgeuse? Not to be confused with Beetlejuice, the Michael Keaton character from the 1988 cult comedy-horror classic, Betelgeuse is one of the biggest and brightest stars in the night sky. It is a red supergiant, a type of star that is near the end of its life. Betelgeuse is enormous compared to our Sun. It has a diameter of about 1,400 times that of the Sun, meaning if it were placed in the center of our solar system, it would extend beyond the orbit of Jupiter. It is also about 15 to 20 times more massive than the Sun.…
Click here to read more
Feb 28th Planet Parade?

What’s this about a planet parade? On Feb 28, up until about 6:28 pm MT, all of the planets in our solar system will align on the same side of the Sun above the horizon, possibly giving some lucky viewers a chance to see all of them simultaneously. Late February, however, is one of the more difficult times of the year to spot Uranus and Neptune, as their visibility is limited. You’ll need very clear and dark skies to see them. While they’ll be visible, it’s unlikely you’ll be able to see them with the naked eye, and even telescopic…
Click here to read more
New Member Orientation

Welcome to the Denver Astronomical Society! The Denver Astronomical Society (DAS) is growing fast! With over 1,100 members and counting, we welcome new astronomy lovers all the time. To help new members get started, we hold New Member Orientations about every four months at the historic Chamberlin Observatory. Our most recent orientation, on February 22nd, was our biggest yet—over 65 new members attended! These orientations include a special presentation from the DAS president and a tour of the observatory. The presentation covers everything you need to know to get the most out of your DAS membership. Here’s a look at…
Click here to read more
Astrocon 2025!!!

This year, we’ll be under the stars for the Astronomical League conference! June 25-June 28, 2025, Ruby’s Inn, Bryce Canyon City, Utah 26 South Main Street www.rubysinn.com Sponsored by the MARS Region of the Astronomical League Check out the ASTROCON 2025 Brochure! The Denver Astronomical Society is pleased to announce that Astronomical League’s ASTROCON 2025 will be held during the new moon June 25-28 2025, at Ruby’s Inn, near the entrance to Bryce Canyon National Park. Along with talks and workshops given during the day, nightly dark-sky observing will be offered at Rainbow Point. Remember that your membership in the DAS includes membership to the Astronomical League.…
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.