The astronauts and cosmonauts aboard the International Space Station spent their first full week as Expedition 74 crewmates.

Astronomers have followed 3I/ATLAS since its discovery on July 1. Hubble photographed it on July 21 from 277 million miles ...

New images taken with the Gemini North telescope in Hawaii confirm that the interstellar comet 3I/ATLAS has gotten brighter ...

I/ATLAS attracted attention when it was confirmed to be only the third body originating from another star system.

Astronaut Jeremy Hansen talks to Bob McDonald about the final preparations for his 10-day mission around the moon, where ...

The cometary cameraman was not the only one to snap the celestial snowball of late. On November 30, NASA’s Hubble Space Telescope captured a deeper look at interstellar comet 3I/ATLAS, with its Wide ...

A rocky exoplanet outside the Earth's solar system may have an atmosphere, according to new evidence gathered by NASA ...

Images from NASA's Galileo mission reveal a tantalizing starburst-like feature. Scientists call it a "wall demon." ...

NASA has lost contact with its MAVEN spacecraft that launched from Florida and has been orbiting Mars for more than a decade.

A mysterious interstellar comet known as 3I/ATLAS is about to make its closest approach to Earth in December 2025. Here's ...

NASA is probing a sudden loss of contact with its MAVEN Mars orbiter after rare 3I/ATLAS data, raising questions about timing ...

Leaked images of 3I/ATLAS suggest the US may have been tracking the interstellar object for years using the secret Cassandra planetary defense system, long before the public knew.