GRAVITY!! i could be wrong...
Not all of the planets are held by gravity.
they are thought to not have merged to form planets due to Jupiters gravitational force preventing them from merging
The planets revolve attracted by the gravitational force of primarily the sun and to a lesser degree the gravitational attraction of other planets. The reason for the orbit is thought to relate to the rotation of the primeval gas could which gave berth to the sun and the planets.
friction is a natural force
The force is called gravity. It is a force that works both ways, i.e. when the Sun's gravity operates on a planet, there isan equal an opposite force acting the other way but the Sun is so massive it hardly moves, because force equals mass times acceleration, so if mass is large the acceleration is low.
gravitational
Not all of the planets are held by gravity.
That force is called gravity.
It is each planet's surface gravity.
they are thought to not have merged to form planets due to Jupiters gravitational force preventing them from merging
it is called natural radioactivity
well the motino is called hippodelightess and it is a very strong force of gravity.
The force that keeps all of our planets in rotation is gravity.
The planets revolve attracted by the gravitational force of primarily the sun and to a lesser degree the gravitational attraction of other planets. The reason for the orbit is thought to relate to the rotation of the primeval gas could which gave berth to the sun and the planets.
The sun is a natural physical object, part of a group of objects called stars. These are created by the accumulation of matter through a natural force called gravity.Such objects can then produce certain natural forces such as electromagnetic radiation. Light, heat, etc.
Planets orbit around the Sun because of the Sun's gravitational force, it makes the planets move by its gravitational force.
Planets and stars have gravity.