By gravity
If planets did not move in a fixed orbit, their paths would become unpredictable and chaotic. This would likely result in collisions between planets or ejections from the solar system. Ultimately, the stability of the entire solar system would be compromised.
9 P in the S S = 9 Planets in the Solar System
There are nine planets in the solar system
Extra solar planets are planets that is outside of our solar system.
There are 5 rocky planets in our solar system if you count Pluto. If not, there are 4 rocky planets in the solar system.
There are eight planets and five dwarf planets in our solar system.
Actually no, because a solar system is just a place for planets to be there. Solar system is just like space.
eight planets in the solar system
One way to categorize the solar system's planets?
There are 9 Planets near are Solar System.
The eight planets of our system are not considered small solar system bodies, to qualify as a planet in the first place means that they have to be quite large. Small solar system bodies are such things as comets, asteroids, meterorids, moons or minor planets.
The planets are part of the makup of the solar system. I guess you could say the sun provides light for the planets and gravety that holds them to the solar system.