Milky Way and the Galaxy Girls (MWGG for short) is a toyline created by Lauren Faust. It is inspired by 90's Strawberry Shortcake, except the characters are different types of girls, supposedly being the personifications of planets.
There was also going to be an animated series pitched to Hasbro, where its pilot would be about Milky Way accidentally freeing the Black Hole from a planetoid while she was exploring the solar system, and meets each Galaxy Girl, to use their special talents for defeating Black Hole. Unfortunately, Hasbro disagreed with the concept. It later became the more famous television show called My Little Pony: Friendship is Magic.