which force keeps the planets from floating off into space?\no earths gravity\no the suns gravity\no the…

Brief Explanations:

The Sun's gravity is the dominant force in the solar - system that keeps the planets in their orbits and prevents them from floating off into space. Earth's gravity affects objects on Earth and near - Earth space, the moon's gravity affects Earth and the moon's own orbit, and the Milky Way's gravity affects the motion of the solar system within the galaxy but not the individual planets' orbits around the Sun.

Answer:

the Sun's gravity