K2-18b, which has eight times the mass of Earth, just might be covered with a massive ocean and blanketed by an atmosphere ...

The Solar System consists of our star, the Sun, and everything bound to it by gravity; the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, along with dwarf planets like ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

A new study released on Thursday describes a search for what are called "microlensing" events, where a planet acts as a ...

"This measurement of the planet population from planets somewhat larger than Earth all the way to the size of Jupiter and ...

Scientists know of over a dozen planets that orbit twin stars like the fictional "Star Wars" desert planet Tatooine. More ...

In a memorable image from the 1977 film "Star Wars," the young hero Luke Skywalker gazes at two suns setting above the ...

A new study suggests we could be a step closer to figuring out if alien life is out there, trillions of miles away from Earth ...

WASHINGTON >> In a potential landmark discovery, scientists using the James Webb Space Telescope have obtained what they call ...