New research suggests that a massive, unidentified object might have passed through our Solar System billions of years ago, ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

High radiation during a time of frenzied star formation in the Milky Way left one stellar population with few chances to form planets, a study reports.

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

The mystique of Mars has been studied for centuries. The fourth planet from the Sun is reminiscent of a rich, red desert and features a rugged surface challenging to traverse. While several robotic ...

The mystique of Mars has been studied for centuries. The fourth planet from the sun is reminiscent of a rich, red desert and features a rugged surface challenging to traverse. While several robotic ...

Plus: Saturn’s moon Iapetus is visible, our Moon passes the bright star Spica, and Mars skims south of Pollux in Gemini in ...