No - the definition of a star isn't fuzzy at all. It's defined by hydrogen fusion - if it's doing that (or did in the past), it's a star, or if it isn't then i

No - the definition of a star isn't fuzzy at all. It's defined by hydrogen fusion - if it's doing that (or did in the past), it's a star, or if it isn't then it's not. Jupiter fails this by a factor of 75. Brown dwarfs (which fuse deuterium but not regular hydrogen, starting at about 13x Jupiter's mass) were thought to be in a fuzzy area, but then their own category was created for them.