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Archives for November 2025

Going Analog with the North America Nebula

November 30, 2025 by Brian Ventrudo Filed Under: Astronomy Images and Video, Stargazing

The region around the North America showing star clouds and Deneb (Alpha Cygni). Captured on Fujifilm Acros II film on a Pentax 67 medium format camera with a 400mm Takumar lens at f/5.6, 60 minutes tracked exposure. Image credit and copyright: James Cormier.

“These are the last days of the waning year;
High in the west now stands Deneb,
Great Star of the Cross…”
– Robert Burhnam Jr., Burnham’s Celestial Handbook, vol. 2.

An icy blast of cold and snow landed across the western Canadian prairies this week, but it wasn’t quite cold enough to keep me from having a long last look at the stars of northern summer now fading fast in the western sky. Scanning slowly with a pair of wide-field ‘constellation’ binoculars, I took in the stars of Lyra and Aquila, Delphinus and Sagitta, and the open star cluster IC 4665 near the asterism of Taurus Poniatowski that spells out a contradictory “HI” as it heads below the horizon until spring. But I reserved my final gaze of the evening for one of my favorite patches of sky near the star Deneb at the top of the Northern Cross and the adjacent glow of NGC 7000, the North America Nebula, about 3o to the east. [Read more…] about Going Analog with the North America Nebula

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Filed Under: Astronomy Images and Video, Stargazing

A Visitor from Beyond: Comet 3I/ATLAS Rounds the Sun

November 1, 2025 by Brian Ventrudo Filed Under: Science, Solar System

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory. The image shows the comet’s broad coma — a cloud of gas and dust that forms around the comet’s icy nucleus as it gets closer to the Sun — and a tail spanning about 1/120th of a degree in the sky (where one degree is about the width of a pinky finger on an outstretched arm) and pointing away from the Sun. 3I/ATLAS is only the third confirmed interstellar visitor to our solar system. Image credit: Gemini South/NSF.

It’s a comet! No, it’s an alien spaceship! No, it’s probably just a comet. But Comet 3/I ATLAS isn’t just any comet. This speedy little visitor, which was discovered by the ATLAS survey telescope near Río Hurtado, Chile, on July 1, 2025, is only the third confirmed interstellar comet or asteroid ever observed in our cosmic neighborhood. It’s a free ‘sample delivery mission’ from another star system, and it may help reveal secrets and insights about the nature and composition of other stars and planets in the Milky Way [Read more…] about A Visitor from Beyond: Comet 3I/ATLAS Rounds the Sun

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Filed Under: Science, Solar System

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