Aliens, or extrateressials are a type of non-Earth monsters from outer space and other planets. Some of them might be from outer space instead of a planet, but that is sometimes pretty rare. Aliens are forms of extrateressial life that are made from more stardust than any other monster or a human. They might have some Earth language or languages, such as English, but besides the point, they are Earth-foreign. The most well-known alien in Monster High is Astranova and she is the first.