For centuries people did not know that this planet even existed. Evidently it was discovered by Johann Galle and Heinrich D'Arrest in 1846. Neptune is the smallest of the four gas giants in our Solar System. Neptune is mostly similar to Saturn and Uranus, Neptune's atmosphere contains hydrogen, helium and methane. Neptune's atmosphere is a large white cloud that moves around rather quickly. The word "Scooter" became predominant because of "scooting" of this cloud around the atmosphere.
Neptune was the god of water and the sea when thus he was known as the Greek god Poseidon. Assuming you weigh 70 lbs (32 kg) on the Earth, you would weigh 78.5 lbs (36 kg) on Neptune.