Their new study shows that Earth’s massive drop in temperature after the dinosaurs went extinct could have been caused by a large drop in calcium levels in the ocean. The study showed that the ...

Russell W. Porter had a fascination with telescope-making that proved contagious: When he moved to Springfield, Vermont, in 1919, many townsfolk quickly became interested in his hobby, prompting ...

The Moon passes 4° north of Jupiter at 9 P.M. EST. The pair shares the central regions of Gemini this evening, with the Moon appearing to the upper left of Jupiter, and framed on the left by the Twins ...

NASA's IR space scope explores the Milky Way’s most prolific star-forming region, cracking open new secrets of how stars form.

Although the Moon is growing brighter, there’s still plenty to see in the evening sky. Astronomy contributor Phil Harrington calls the shape formed by the bright stars Betelgeuse, Sirius, and Procyon ...

NASA’s Artemis 2 crew was moved into quarantine on Friday to ensure their health and safety in the days leading up to the much-anticipated launch. For the first time in over 50 years, NASA is ...

There’s plenty to view in the early-morning sky, especially with no Moon visible before dawn. Although anchored by the bright star Arcturus, the constellation Boötes is relatively devoid of bright ...

Saturn’s four brightest moons are lined up for ideal viewing this evening. You can catch the ringed planet for a few hours after sunset, as it slowly sinks toward the western horizon. Around 7 P.M.

Ganymede transits the face of Jupiter this morning, trailed by its large shadow. The event starts just before 4 A.M. EST, as Jupiter is slowly setting in the west for much of the U.S. (The planet is ...

The September 2025 issue featured “A guide to beginner’s guides,” a reminiscence and description of some the books for astronomy beginners that Contributing Editor Raymond Shubinski recommends or ...

The gibbous Moon passes 5° north of Uranus at 2 P.M. EST. Tonight, you’ll find our satellite just northeast of the Pleiades star cluster in Taurus, with Uranus to their southwest. Many areas in Europe ...