At a young age, we're told how the sun warms Earth and makes life possible. That idea sticks with most of us for life. But when we want to understand things more thoroughly and we dig more deeply, we ...

Exoplanets aren't the only objects floating around other stars—they likely have comets and asteroids as well. Even some of the exoplanets themselves will have "exomoons," at least according to our ...

Add Yahoo as a preferred source to see more of our stories on Google. Moons orbiting starless "rogue" planets could stay warm enough to host liquid water for billions of years, a new study suggests, ...

We have an idea of what the solar system's past was like: It was violent and chaotic. However, we are still studying how violent it was. Current models suggest that at some point after their formation ...

Venus is one of only two planets in our solar system that lack a moon. (Mercury is the other.) NASA / JPL-Caltech Earth’s next-door neighbor Venus is often called our twin. The two planets feature ...