mercury is the closest planet to the sun but it is not the hottest.
Venus is the the second closest planet to the sun and it it also the hottest planet.
earth is the only planet in the universe that is known to have life.
mars is the 2nd smallest planet the largest volcano in the solar system is on mars its called Olympus Mons.
Jupiter has 80 moons it is 4.603 billion years old and it is the biggest and oldest planet in the solar system.
Saturn is the only planet that has visible rings with a normal telescope its the second biggest planet in the solar system
Uranus is made of mainly hydrogen some helium and a little bit of methane.
Neptune is the windiest planet in the solar system and it has 14 moons and its the last planet in the solar system.