There are a ton of planets out there in the universe, and each one is different from the next.

Astronomers have long believed that water-rich and ice-filled 'water worlds' are among the most common types of planets in ...

Jupiter-type planets come in two sizes, and these two types of planets formed in very different ways.

Aliens, should they exist, likely inhabit rocky planets like ours, but new research proposes an entirely new type of habitable world—one that scarcely resembles Earth. Earth is the only ...

Planets orbiting distant stars come in an even wider variety, including lava worlds and “hot Jupiters.” Observations by NASA’s Hubble Space Telescope have added a new type of planet to the mix.

Based on these types of studies, he has come to believe that habitable worlds can be split into four categories, each with varying likelihoods of being home to extraterrestrial organisms.

It had previously been thought that planets were more likely to form around a star if the star had a high content of heavier elements. But new research from University of Copenhagen, shows that ...

Based on these types of studies, he has come to believe that habitable worlds can be split into four categories, each with varying likelihoods of being home to extraterrestrial organisms.

Scientists have found evidence of extraterrestrial clouds blanketing two of the most common types of planets in our Milky Way galaxy, NASA officials say. Two teams of researchers used the Hubble ...

It had previously been thought that planets were more likely to form around a star if the star had a high content of heavier elements. But new research from the University of Copenhagen, among ...