Astronomy

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

November 3: Test your eyes on the Moon: Weather permitting, tonight is a great night to go through some of Pickering’s features that look best during the waxing gibbous phase of the moon, including: Gassendi, Plinius region, Vaporum, Lubiniezky region, Medii, Sacrobosco, Huygens region, and Riphaen Mountains.… Continue reading.

Last month, we discussed the Hubble’s Night Sky Observing Challenge and the October targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope. These organizations have announced a new set of targets for the month of November.… Continue reading.

With all the comet buzz this year—from C/2025 A6 (Lemmon) to C/2025 R2 (SWAN) to several other icy visitors lighting up our skies—it’s the perfect time to explore what comets really are, how astronomers have studied them through history, and how these ancient wanderers get their names.… Continue reading.

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

October 27: Astronomy on Tap – Boulder with Dr. Hal Levison, Dr. John Spencer, and Matt Benjamin: Free In-person presentation: 📍Rayback Collective: 6:00 PM DAS E-Board Meeting: Online Meeting via Zoom (check membership email for details): 7:00 PM October 28: Look for the ringed gas giant Saturn between the constellations Aquarius and Pisces about 45° above the southern horizon: 10:00 PM October 29: Screening of Gathered in Darkness, a 2024 total solar eclipse documentary premiere, followed by a panel and Q&A with scientists Amir Caspi, Sarah Kovac, and Paul Bryans, and filmmaker Daniel Zietlow: Free in-person presentation (Registration is required): 📍 Frasier Retirement Community: 7:30 PM 60 Minutes in Space – Dr.… Continue reading.

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

October 20: Look for the gas giant Jupiter next to the twins Castor and Pollux in the constellation Gemini in the eastern sky after midnight. October 21: Catch comets C/2025 R2 (SWAN) and C/2025 A6 (Lemmon) with your naked eye: 7:30 PM & 10:00 PM Boulder Stargazing – Dark Skies & Deep Space: Orionids and the Science of Starlight (Registration required): 📍 Beech Shelter, Boulder: 5:45 PM  New Beaver Moon: 6:25 AM October 22: Orioinid Meteor Shower Peaks: After Midnight Dark Sky Salida Presentation: 📍 Valley View Nature Learning Center: 6:00 PM October 23: Look for the waxing crescent Beaver Moon meeting up with Mercury and Mars in the constellation Libra just above the horizon after sunset Standley Lake Stargazing: How to Observe the Planets: Virtual Program via Zoom: 6:00PM Last day of the DAS Fall Astronomical Equipment Auction: Midnight.… Continue reading.

On the evening of October 21, 2025, skywatchers are in for a rare celestial treat: not one but two comets—C/2025 R2 (SWAN) and C/2025 A6 (Lemmon)—will be bright enough to spot with the naked eye. To make the night even more special, it also falls on the new moon, meaning the sky will be as dark as it gets, free of interfering moonlight.… Continue reading.

October is one of the best months of the year to catch a meteor shower. This year, skywatchers get a bonus: two meteor showers active at the same time. The famous Orionids will peak in late October, and the slower but often brighter Southern Taurids will also be putting on a show.… Continue reading.

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

October 13 (Indigenous People’s Day): Catch the 3rd quarter Hunter’s Moon with the twin stars Castor and Pollux in the constellation Gemini in the early morning eastern sky.… Continue reading.

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

October 6: Full Hunter’s/Harvest Moon: 9:47 PM October 7: Look for Jupiter occulting the Twinkling Comet Cluster in the low eastern skies in Gemini – The “Twinkling Comet Cluster” (NGC 2420) is a rich open cluster often described as a ghostly glow that fans out like a comet’s tail before resolving into stars: 1:00 AM October 8: The waxing gibbous Hunter’s Moon reaches perigee (it’s closest distance to Earth at distance 359,819km) at 6:50 AM.… Continue reading.

Last month, we discussed the Hubble’s Night Sky Observing Challenge and the September targets announced by the Astronomical League and NASA to celebrate 35 Years of the Hubble Space Telescope. These organizations have announced a new set of targets for the month of October.… Continue reading.