The third planet from the Sun, Earth is the only planet known to support life. Nicknamed the "Blue Planet," Earth has a unique mix of air, water, and land unlike anything else scientists have seen on other planets.

The planet closest to the Sun, Mercury is the smallest planet in the solar system. Nicknamed the "Swift Planet," it orbits the Sun faster than any other planet. Mercury is known for its extreme heat and steep cliffs.

Dwarf planets are smaller than planets and can be found throughout the solar system. So far, five dwarf planets have been officially recognized. Scientists think there may be hundreds more dwarf planets in the solar system.

The sixth planet from the Sun, Saturn is known for its rings. These rings can be seen from Earth using a telescope. Saturn also has dozens of moons, including the only moon in the solar system known to have a thick atmosphere.