In 1781, German-born British astronomer William Herschel made Uranus the first planet discovered with the aid of a telescope.

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 ...

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 ...

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 ...

We're showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

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

Olympus Mons, the solar system’s largest volcano ... humans have robotically explored Mars more than any other planet beyond Earth. Currently, eight missions from the U.S., European Union ...

Our solar system used to have nine planets ... “In terms of scientific viability, we know that there are eight planets already, so it’s not so crazy to have another planet within the same ...