NASA has lost contact with its MAVEN spacecraft that has been orbiting Mars for more than a decade. Here's what we know.

On December 19, this interstellar visitor with its peculiar composition offers a glimpse into the makeup of celestial bodies ...

Astronomers studying the interstellar comet known as 3I/ATLAS have detected a vast and unexpected X-ray halo extending ...

Leaked images of 3I/ATLAS suggest the US may have been tracking the interstellar object for years using the secret Cassandra ...

The interstellar comet 3I/ATLAS has started to brighten and dim in a remarkably steady rhythm, repeating every 16.16 hours as ...

Interstellar comet 3I/ATLAS, a visitor older than the Sun, has stunned scientists with a colossal, puzzling X-ray cloud ...

Interstellar comet 3I/ATLAS has arrived in our neighborhood trailing something far more consequential than a pretty tail: ...

Scientists uncover unusually high methanol levels "raging" beyond the nucleus of interstellar comet 3I/ATLAS, revealing ...

Interstellar comet 3I/ATLAS is captured over Egypt’s Black Desert as it returns to view after its solar passage. Learn how the image was taken and how to observe it ...

The cometary cameraman was not the only one to snap the celestial snowball of late. On November 30, NASA’s Hubble Space ...

Discovered on July 1 by the NASA-funded ATLAS telescope in Chile, 3I/ATLAS is only the third confirmed visitor from another ...

Interstellar object 3I/Atlas appears in NASA’s Punch images during a 40-day study of Comet Swan, offering new data on motion near the Sun ...