A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

BRISBANE, Australia – Momentus and Solstar Space announced a three-year agreement Oct. 13 to expand communications, ...

Earth’s turbulent atmosphere makes it hard to detect new planets from the ground. Astronomer Rebecca Jensen-Clem is working ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

The growth spurt hints that the free-floating object evolves like a star, providing clues about rogue planets’ mysterious origins.