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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Pathetic Jupiter: Skyward for March 2026

Why would I want to write something insulting about Jupiter? After all, Jupiter is the first thing I looked at through a telescope. Only last month I wrote how, when I began searching for comets, I was looking for an activity that did not involve me dealing with other people. I had a few friends as a youngster. Now in my ripe age of 77, I have many good friends, of whom the current editor of Desert Skies is one of my closest. But I still enjoy, more than anything, the idyllic solitude of looking through my telescope, field after…
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Denver Astronomical Society Judges at the Denver Metro Regional Science & Engineering Fair

Members of the Denver Astronomical Society (DAS) were proud to participate in the 63rd annual Denver Metro Regional Science & Engineering Fair (DMRSEF) on February 20, 2026, held on the Auraria Campus in downtown Denver. The Denver Metro Regional Science & Engineering Fair is one of Colorado’s largest and longest-running STEM competitions. Each year, middle and high school students from across the metro area present original research projects in fields ranging from engineering and medicine to physics and astronomy. Top winners often advance to state and international competitions, making this event an important stepping stone for the next generation of…
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What You Need to Know About the 2026 Total Lunar Eclipse in Denver

The upcoming total eclipse of the full Worm Moon on March 3, 2026, presents a remarkable opportunity for Denver skywatchers to observe this celestial event. Here’s a comprehensive guide covering the timing, phases, scientific background, and observing tips. What Causes Lunar Eclipses and What’s a Blood Moon? A lunar eclipse happens when Earth passes directly between the Sun and the Moon, casting Earth’s shadow (its dark umbra) across the lunar surface. It only occurs at full moon, but not every full moon produces an eclipse — and that’s because the Moon’s orbit is tilted about 5° relative to Earth’s orbit…
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What’s Up in Denver? February 23rd through March 1st, 2026

Here’s a brief look at what’s going on in the Mile High City this week. February 23: 👀 Look for the waxing crescent Worm Moon near the Pleiades, the brilliant open star cluster also known as Messier 45 high in the southern sky in the constellation Taurus around 7:00 PM 🖥️ DAS E-Board Meeting: Virtual meeting via Zoom (check membership email and slack for details): 7:00 PM February 24: 🖥️ Space Telescope Science Institute (STScI): Discovering the Least-Massive Brown Dwarfs Known with the James Webb Space Telescope: Free virtual program on YouTube: 5:00 PM 🌓 First Quarter Worm Moon: 5:28…
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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.