Earth and Mars may have formed through very different processes, despite developing as neighbors in the early solar system.

Astronomers watched water clouds grow thicker and thinner on a world trillions of miles away. It's familiar weather in a ...

The discovery of an Earth-like planet 4,000 light years away in the Milky Way galaxy provides a preview of one possible fate for our planet billions of years in the future, when the sun has turned ...

Astronomers have discovered a planet closer and younger than any other Earth-sized world yet identified. It's a remarkably hot world whose proximity to our own planet and to a star like our sun mark ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Artist’s conception of the view from the surface of the ...

A potential Tatooine-like planet from Star Wars of Earth’s size in a nearby binary star system can hold liquid water and ...

A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...