Barnard’s Star hosts four hostile small planets whose unusual chemistry and orbital rhythm reveal how compact planetary systems can form and survive.

Jupiter goes around its star in 180 days, which is a long time compared with most exoplanets we've discovered.

Astronomers directly imaged a Jupiter-mass object orbiting a brown dwarf 72 light-years away, making it the strongest candidate yet for the first known exomoon.

A brown dwarf is wobbling on its path around a star in a manner that indicates it has its own giant satellite. This ...

Scientists are documenting a planetary system in the Milky Way galaxy that is so starkly dissimilar to our own solar system ...

NASA has highlighted the return of comet 10P/Tempel, a periodic comet that is once again moving through the inner solar ...

A shattered asteroid may have unleashed a long-lasting cosmic barrage that left scars across the inner solar system and ...

The Milky Way may have undergone a dramatic change in orientation during its history, according to new research that helps ...

A violent collision in the main asteroid belt may have sent debris raining across the inner solar system about 800 million ...

Although general relativity (GR) is an elegant theory of gravity, we don't often need to use it. For most gravitational ...

Reflect Orbital has won initial approval for a plan to put thousands of mirrors in orbit that would be visible from anywhere ...