This video explains how the solar system formed and why most planets move in the same direction, using basic physics and ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A composite image comparing the relative sizes of our solar system's known dwarf planets, ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

Hubble observations reveal a giant, turbulent planet-forming disk that may reshape theories of how planetary systems develop.