NASA STEREO-A satellite's SECCHI/HI-2 camera captured this imagery of Comet C/2021 A1 (Leonard) Credit: Space.com | footage ...

The comet is known as 3I-Atlas and is currently 238 million miles from Earth. According to NASA, the comet is expected to ...

It’s like glimpsing a rifle bullet for a thousandth of a second, David Jewitt of the University of California, Los Angeles, described of the brief existence of interstellar comet 3I/ATLAS. The third ...

A new image shows the growing tail of a comet from another star system streaking across our solar system. The image of comet ...

Named 3I/ATLAS, the comet is only the third known interstellar object to enter our solar system, and it's the largest and ...

A telescope in Chile recently glimpsed 3I/ATLAS' glowing tail, which observations reveal has grown as the interstellar object ...

Comet Leonard, which last passed by Earth 80,000 years ago, has been dazzling the night sky before Christmas.

A comet from a solar system outside our own was first noticed on July 1 by a NASA telescope located in Rio Hurtado, Chile, as part of the Asteroid Terrestrial-impact Last Alert System (ATLAS).

Comet Leonard, which last passed by Earth 80,000 years ago, has been dazzling the night sky before Christmas.

NASA’s Hubble Space Telescope has captured its most detailed image yet of interstellar comet 3I/ATLAS. The rare comet is ...

Telescope observations reveal a growing tail on the comet that's visiting from another star. Released Thursday, the pictures ...