NASA planetary director James Green comments on the Rosetta mission's success: "How Audacious! To dare to land on a ...

Since water is one of the vital ingredients for life on Earth, scientists want to know how it got here. One theory ...

Here's a refresher from middle school science class: An asteroid is a huge rock tumbling through the solar ...

Europa, long one of the Solar System's most fascinating worlds, might be subject to forces very similar to those ...

The objects that dominated the Solar System early in its history may have been small…but they didn't lack ...

The world known officially as PSR B1620-26 b orbits a binary star system about 12,000 light-years away. With an ...