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.

Orbiting between Mars and Jupiter is an enormous ring of space rocks. The region, known as the asteroid belt, is home to an ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

While its star projector leaves a lot to be desired, the Science Can Solar System Planetary Projector is a fantastic educational tool for kids, with its solar system model, complete with talking ...

In days gone by, explorers traveled into the unknown by sailing on the wind, and the robotic explorers of the future may do some sailing of their own. NASA is on the verge of launching a ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...