Neptune is the eighth planet from the Sun and last of the known planets.
It was named after the Roman god of the Sea.
It takes Neptune 164.8 Earth years to orbit the Sun.
It has the second largest gravity of any planet.
Neptune has a storm similar the Great Red Spot on Jupiter.
Neptune also has a second storm called the Small Dark Spot.
Neptune spins very quickly on its axis.
Only one spacecraft, the Voyager 2, has flown past Neptune.