First planet of its kind with ‘gargantuan’ comet-like tail discovered - Planet’s ‘tail’ is millions of miles long, ...

The morning of April 24 will give rise to a striking mini-planetary parade, as Mercury, Venus, Saturn, Neptune, and Earth's moon cluster together in the same region of the pre-dawn sky, making for a ...

"What surprised us, at the end, was how effective this type of impact could be in explaining Mercury's unusual structure ...

NASA researchers suggest a surprising discovery on planet Mercury: a diamond layer approximately 10 miles thick, adding to ...

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

By Will Dunham WASHINGTON (Reuters) -Astronomers have spotted a small rocky planet that orbits perilously close to its host ...

Venus is the hottest planet in the solar system due to its thick carbon dioxide atmosphere, trapping heat as part of a ...

Mercury's mysterious makeup may be the result of a grazing "hit and run" collision between two similar-sized protoplanets in the early solar system, a new study suggests. Mercury, the smallest and ...