Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

Astronomers have confirmed the third interstellar object, 3I/ATLAS, speeding towards the Sun at 60 km/s. Classified on July 2 ...

The Bernardinelli-Bernstein comet, located in the Oort Cloud, was observed by the ALMA to record the first evidence of active ...

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever ...

The object gained an official name, C/2025 N1 or 3I/ATLAS, on Wednesday. Moving at a record-setting speed for an interstellar ...

Designated 3I/Atlas, this is likely the largest yet detected and has been classified as a comet, or cosmic snowball ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...