Neptune is very far from Earth. It can't be seen without a telescope. Neptune wasn't discovered until 1846. So, there are no myths about the planet.
Like all the planets, Neptune was named for a Roman god. Neptune was the god of the seas. The Greek name for the god of the seas was Poseidon. Since the planet is as blue as the sea, the name seemed natural. Neptune lived in a palace beneath the ocean. He carried a three-pronged spear, called a trident. The trident was used to change the weather and create storms.
