A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Mars is about 140 million miles from our cozy planet. A human mission to that cold, rocky neighbor would mean being away from Earth for about 3 years. But the things those explorers would see and ...

Jupiter is our solar system's largest planet. The two brown dwarfs are gravitationally bound and orbit near to each other - as close as just 4% of the distance between Earth and the sun.

Probing these wacky celestial bodies can help us understand how conditions beyond our solar system may yield planets vastly different from our own, said study author Thomas Baycroft with the ...