The suns gravitational pull.
it keeps it in orbit
The force of the Sun's gravity keeps them in their orbits.
The Sun's strong gravity keeps all the planets in orbit around it.
Gravity and motion. Gravity pulls the planets in and keeps them from flying away, while the velocity of the planets keeps them from being sucked in completely.
The planets orbit the Sun. The Sun is at the center of our solar system and does not move.
the sun because it keeps the planets in orbit and provides heat.
The force of gravity between the planets and the sun keeps them in orbit and prevents them from flying out of the solar system. The sun's gravitational pull keeps the planets in stable orbits around it.
Gravity is the force that connects the solar system to the sun.
gravity
In our solar system, the sun provides heat and light to the planets; also, the gravitational attraction of the sun keeps the celestial bodies in the solar system in orbit. Without the sun, there would be no solar system.
9 P in the S S = 9 Planets in the Solar System
The gravity of the Sun keeps the planets in their orbits. They stay in their orbits because there is no other force in the Solar System which can stop them.