After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Mercury is closest to the Sun. Neptune is the farthest. Jupiter: This planet has a faint ring system composed ...

With 8 planets now known, the thoughts of astronomers ... than any of the planets in the outer solar system. Nevertheless, because it orbited the Sun like a planet, it was classified as a planet ...

Exoplanets can be quite different from Earth, but occasionally researchers find one that gives a sneak peak into what the ...

Astronomers have discovered an Earth-like planet orbiting a white dwarf 4,000 light years away, offering a glimpse into our ...

Credit: Mark Garlick / Science Photo Library / Getty Images illustration Since its discovery eight ... those two planets could "leak" and become detectable here. In our own solar system, an ...