New 3I/ATLAS images from NASA and the ESA suggest the interstellar comet is active as it approaches Earth in December.

Could Mars have just stolen Earth’s front-row seat to one of the rarest cosmic events in decades? In early October, NASA’s Mars Reconnaissance Orbiter (MRO), the MAVEN spacecraft, and the Perseverance ...

'If it's a heartbeat, then those aliens are really, really, super chill.' ...

Learn about the icy eruptions that may be occurring on Comet 3I/ATLAS, giving it a carbon-rich coat of gas and dust.

The rare interstellar comet, also known as 3I/ATLAS, was first discovered in July and has been photographed several times.

The Eta Aquarid meteor shower will light up the sky Monday, May 5 with a chance to see pieces of Halley's comet streak through the night sky. Here's what to know and when to watch. The annual Eta ...

(AP) - Halley's comet swings near Earth every 75 years. But debris left by the comet leads to two major meteor showers every year including the Eta Aquarids. When this meteor shower lights up the ...

Telescopes around the world are now tracking a new visitor to our celestial neighborhood. Streaking through at a speed and trajectory that not even the Sun's immense gravity can capture, we will only ...

Spectroscopy of other stars has led to most discoveries of exocomet systems. In research led by University of Colorado Boulder undergraduate Adalyn Gibson and published this year in the Astrophysical ...

There's been a lot of speculation recently about interstellar visitor 3I/ATLAS—much of which is probably caused by ...