An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

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

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida ...

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

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

Images captured by NASA's Solar Dynamics Observatory have revealed ... which could act as an early warning system for dangerous space weather. Earth's temporary asteroid friend last year was ...

For much of January and February, you have the chance to see six planets in our solar system after dark, although two — Uranus and Neptune — will be hard to see without a telescope or high-powered ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

Need a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning activities and videos about the solar system Free learning ...