Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed ...

A visible line of planets has for weeks been the talk of astronomers and hobbyist stargazers who have sought to catch a sight of our solar system's worlds. Online chatter and a frenzy of media ...

A very rare treat is about to grace Earth's night skies.

Seven planets are aligning in the night sky this week, creating a brief chance to see a "planetary parade." Worldwide, the best day to see the alignment is today, Feb. 28. Mercury, Venus ...