When a faint green smudge appeared in images from a backyard telescope in Aguadilla, Puerto Rico, on Nov. 22, 2025, astronomers did not expect it to upend basic assumptions about how comets work. Yet ...

Stars like our Sun have around the same overall density as water. But when a star collapses in its old age, and its material gets compressed by runaway gravity, the result is a brilliant white sphere ...

A Harvard scientist has suggested that the trajectory of the mysterious space lump 3I/ATLAS will bring it close enough to ...

A clear look at the discovery of 40,000 near-Earth asteroids, how scientists track them, and the missions working to keep our ...

Harvard astrophysicist Avi Loeb has said it is an 'extraordinary coincidence' that the rumoured 'alien spaceship' 3I/ATLAS will be in the perfect location to drop probes onto Jupiter ...

Interstellar comet 3I/Atlas has moved within 300 million km of Earth as scientists continue tracking its rare journey.

As twilight deepens the week of November 24 to 28, the waxing crescent moon appears in the south to southwest, above the setting Teapot asterism.

New telescope observations reveal structural features never documented in any known celestial object The morphology defies conventional understanding. The forward anti-tail persists where physics says ...

NASA Associate Administrator Amit Kshatriya said that despite many rumors about the traveler, it was definitely a comet, not ...

The James Webb telescope may have detected the universe's earliest and most distant known black hole at the heart of galaxy ...

Mysterious interstellar object 3I/ATLAS could be passing by Jupiter to "seed" the planet with "technological devices." ...

To see Earth from space is to be forever changed by the view. Since Alan Shepard became the first American to lay eyes on our ...