Popstar could technically actually be a planet

The International Astronomical Union defined a planet as an object that:

  • orbits the sun
  • has sufficient mass to be round, or nearly round
  • is not a satellite (moon) of another object
  • has removed debris and small objects from the area around its orbit

Popstar has enough mass to be round, it just doesn’t want to.

Aether  from Metroid Prime 2 is technically not a planet, as it has no sun.

MP2: Aether

Somehow it took me way too long to realize Aether wildlife all developed from lifeforms imported from other planets (or possibly given as “planet-warming” gifts by allies of the Luminoth)

Remember, Aether has no Sun, its day/night cycle is artificial and done by channeling the strange energy unique to the planet. It was probably completely sterile before the Luminoth came.

In a way, the Ing might argue they are the first true natives of the planet.