Venus and Jupiter will be millions of miles apart, but from Earth they will appear close to colliding ... After Saturday, the two planets will go their separate ways as they drift apart in ...

The odd atmosphere of a fledgling exoplanet is causing astronomers to question leading theories of how planets form.

By contrast, giant impacts, while much rarer, are much more energetic and happen only when two planets of roughly equal mass collide. These enormous impacts can completely reshape a planet ...

It is part of a two-planet system ... Scientists believe that planets, including those in our solar system, form when particles in the protoplanetary disk collide and stick together, eventually ...