An exoplanet discovered in 2020 contains the coldest temperatures ever measured on a planetary body, according to scientists.

CAPE CANAVERAL, Fla. (AP) — A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge ...

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

The European Space Agency's Gaia mission has spotted an unusual family of stars all strangely eager to leave home -- a family we couldn't have discovered without the star-surveying spacecraft, and one ...