What’s Up in Denver? October 5th through 11th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

October 5: Look for the waning crescent Harvest Moon in between Mars and the Beehive Cluster (M44), low in the eastern sky in the constellation Cancer around 2:15 AM until dawn.… Continue reading.

What’s Up in Denver? September 28th through October 4th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

September 28: DAS E-Board Meeting: Virtual meeting via Zoom (find details on Slack or Membership email): 7:00 PM September 29: Northern Colorado Astronomical Society: Poudre Learning Center Stargazing: Free, in-person event at Greeley High School: 7:15 PM September 30: 60 Minutes in Space with Dr.… Continue reading.

Golden Gate Canyon State Park Becomes Colorado’s First Urban Night Sky Place

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Colorado’s list of places working to protect the night sky continues to grow. Golden Gate Canyon State Park has officially been designated an Urban Night Sky Place by DarkSky International, recognizing the park’s efforts to reduce light pollution and protect the nighttime environment for wildlife, visitors, and future generations.… Continue reading.

Observing Wolf-Rayet Stars in the Constellation Cygnus

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by John H. Bickel, Ph.D. Denver Astronomical Society, Member

What is a Wolf-Rayet star?

In 1867, French astronomers Charles Wolf and Georges Rayet using the 40 cm Foucault telescope, at the Paris Observatory [Ref. 1], discovered three stars in the constellation Cygnus (now designated HD191765, HD192103 and HD192641) that displayed broad emission bands instead of the typical absorption lines seen in most stellar spectra.… Continue reading.

What’s Up in Denver? September 21st through 27th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

September 21: On this day in 2003, NASA ended the Galileo spacecraft’s mission by sending it into Jupiter’s atmosphere after nearly eight years exploring the giant planet and its moons.… Continue reading.

What’s Up in Denver? September 14th through 20th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

September 14: DAS General Meeting: “A Graphical Tour of the Cosmos”w/ Dr. Ed Friedman: Free, in-person event at Secular Hub: 7:00PM Check out the waxing crescent Harvest Moon near Venus: low in the western sky in the constellation Virgo just after sunset at 8:00PM September 15: On September 15, 1966: Gemini 11 returned to Earth after a three-day mission that included rendezvous and docking with an Agena target vehicle and two spacewalks.… Continue reading.

DAS Astrophotography Gallery for September 2026

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The Denver Astronomical Society Astrophotography Special Interest Group (ASIG) September Member Gallery

Each month, the Astrophotography Special Interest Group (ASIG) of the Denver Astronomical Society gathers to share one of the most inspiring parts of our hobby—the images we’ve captured of the night sky.… Continue reading.

What’s Up in Denver? September 7th through 13th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

September 7: Look for the waning crescent Stergeon Moon making a line with Castor and Pollux and Mars nearby in the constellation Gemini low in the eastern skies around 3:00AM until dawn.… Continue reading.

What’s Up in Denver? August 31st through September 6th, 2026

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Here’s a brief look at what’s going on in the Mile High City this week.

August 31: Look for the waning gibbous Sturgeon Moon near Saturn low in the eastern sky in the constellation Pisces around 10:30PM September 1: Catch Venus right next to Spica.… Continue reading.

Frisco Becomes Colorado’s Newest Dark Sky Community

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Colorado’s list of communities working to protect the night sky continues to grow. The Town of Frisco has officially been designated an International Dark Sky Community by DarkSky International, recognizing the mountain town’s commitment to reducing light pollution and preserving its spectacular nighttime environment.… Continue reading.

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