When you buy through links on our articles, Future and its syndication partners may earn a commission. New research suggests that most of the solar system's inner rocky planets once orbited the sun in ...

The Solar System is home to a remarkable range of planets, from tiny rocky worlds to massive gas giants. But just how big are these planets really? To put it into perspective, we can run some ...

Six planets are visible in the night sky right now. On Feb. 28, Mercury will add a seventh planet to the planetary parade. Venus, Mars and Jupiter are 'great naked-eye targets' for beginning ...

Two planets, one rocky world close to the sun and one gas giant, are about to appear close to each other in the night sky in a small planetary conjunction next week. Mercury and Saturn are expected to ...

Two faraway worlds in the solar system are about to appear rather close to each other in the night sky on Monday. The first planet from the sun, Mercury, and Saturn, the second of the gas giants in ...

Late-stage planetary collisions reshaped Earth and its neighboring planets, delivering water, altering their atmospheres, and influencing their tectonics. New findings suggest these violent impacts ...