What’s Up in Denver? October 19th through 25th, 2026

with No Comments

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

October 19: University of Arizona: Big G: The Ghost in the Machine by Dr. Vasileios Paschalidis: Free, online event via Zoom: 8:30 PM October 20: Amateur Astronomers Association: Complex Rotators and Their Mysterious Light Curves with Dr.… Continue reading.

The Orionid Meteor Shower Returns to the 2026 October Skies

with No Comments

October is a great month for meteor watching, and one of the year’s most reliable showers will soon be lighting up the night sky. The Orionid meteor shower reaches its peak in October, giving stargazers a chance to see fast, bright meteors streak across the sky.… Continue reading.

What’s Up in Denver? October 12th through 18th, 2026

with No Comments

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

October 12: Catch the waxing crescent Hunter’s Moon near Venus and Mercury in the constellation Libra in the western sky just as the sun is setting around 6:15 PM Mercury reaches its greatest eastern elongation, appearing farthest east of the Sun from our vantage point on Earth.4:00 AM October 13: Cosmic Collisions: How Black Hole Mergers Shape the Hearts of Galaxies with Dr.… Continue reading.

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

with No Comments

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

with No Comments

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

with No Comments

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

with No Comments

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

with No Comments

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

with No Comments

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.

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

with No Comments

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.
1 2 3 4 … 18