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 ...

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it looks like. Now, new simulations may have given them a first glimpse. When you ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars. When you purchase through links on our site, we may earn an affiliate commission.