The name of an alien race will almost always be derived from the name of their home planet. This trope seems to have started with fictional creatures from a real planet or star; the aliens hail from Mars or Polaris, so it made sense to call these creatures Martians or Polarisoids. But by now it goes beyond that, into cases where the aliens' home world is every bit as fictional as the creatures themselves. This trope is the reason why, as detailed in Humans by Any Other Name, aliens will tend to call the human race by a word like "Earthling." Examples of Named After Their Planet include: