Posted by Lauren on .
If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out.
Try some of the following links:
The earth doesn't "float", it orbits the sun following Newton's Law of Universal Gravitation. The presence of the sun, which is much more massive than earth and the other planets, drives the movement of the planets. The sun is so dense that a spoonful of it is approximately as massive as the Rocky Mountains! The attractive force between the planets and the sun known as gravitational force is what determines the orbit of the planets. The orbiting motion is continuous and can be described by Kepler's Laws.
According to the condensation theory, the most important factor for the formation of our planets was __