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 ...

When VOYAGER 2 flew by neptune and its largest satellite, Triton, in 1989, it revealed a moon with never-before-seen terrain and plumes spurting from the surface. At the time, scientists attributed ...

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 ...

For the first time, scientists believe they have captured direct evidence of the mechanisms that trigger a solar flare. These massive explosions, generated by the Sun, release staggering amounts of ...

Take advantage of the dark window before the crescent Moon rises to explore the Rosette Nebula, also cataloged as NGC 2237. This gorgeous sight is made up of a central open star cluster surrounded by ...

Albert Einstein’s theory of general relativity is just over 100 years old, and so far it has predicted the interaction between celestial objects and the space-time field very well. There are a few ...