round and orbit the sun
By definition planets orbit a star and satellites orbit a planet. Therefore there are no satellite planets.
None, by definition. Moons go around planets.
8
there called celestial bodies
Somebody who studies the stars and planets.
Planets don't have planets. The Sun has planets, and planets have moons.Dwarf planets might orbit around each other, but this answer uses the correct definition of the term planet, which does not include Pluto or Charon.
Two Planets was created in 1897.
The other two planets are Mercury and Venus.
Planets cannot have stars orbiting them by definition.
Because there are only eight planets in our solar system, a definition of "top" would be needed - since the definition would thus have to include exoplanets discovered outside the solar system.
Two types of planets are terrestrial planets, which are small, rocky planets like Earth, and gas giant planets, which are large planets primarily composed of hydrogen and helium, such as Jupiter and Saturn.
Mercury and Venus are the two planets that have no moons.