An object that was born around another star, drifted through interstellar space for longer than the Sun has existed, and briefly passed through the inner solar system is now on its way back out into ...

Astronomers have identified a small, frozen world orbiting far beyond Neptune whose strange path complicates one of the most ...

Fast-changing sodium gas around the 5. 4-million-year-old star PDS 70 provides evidence that icy exocomets may be plunging ...

Unpopular opinion time, Pluto being reclassified as a dwarf planet was a great thing for our understanding of the solar ...

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, ...

When 'Oumuamua traversed our solar system in 2017 it was the first confirmed Interstellar Object (ISO) to do so. Then in 2019, Comet 2l/Borisov did the same thing. These are the only two confirmed ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...

CAPE CANAVERAL, Fla. — Astronomers have discovered a rare solar system in the Milky Way that boasts six planets orbiting in perfect rhythm like a cosmic orchestra, untouched by outside forces since ...