When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: rbkomar/Getty Images Earth isn't alone in orbiting our sun; it's joined by a bunch of ...

This skywatching quiz will test your knowledge of how eclipses, when to see them, and what makes each one so spectacular.

It's Space Week from 4 - 10 October. But how much do YOU know about space and our solar system? Test yourself with our ...

Visual: In this diagram, J, S, U, and N are the solar system’s giant planets. What’s the collective name for the objects in ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...