Planetary scientists recently simulated an alternate version of our solar system: one with a super-Earth causing climate ...

Learn how you can see bright Jupiter from Earth, helped by its massive size and banded, reflective cloud tops, in December's ...

Olympus Mons, the solar system’s largest volcano ... Mars got its two faces because an object the size of Earth’s moon slammed into Mars near its south pole. Both hemispheres do have one ...

So, even though Mercury is closer to the Sun, Venus is the hottest planet in the solar system. Mars has a hard ... Some are the size of small stones and pebbles. Some measure hundreds of ...

and Mars. These planets are relatively small in size and in mass. A terrestrial planet has a solid rocky surface, with metals deep in its interior. In the solar system, these planets are closer to ...