Gravity combined with the object's "sideways" (tangential to its orbit) motion.
The Sun "wants" to pull the object towards it and the object "wants" to fly of into space. When these two things are balanced the object is in a stable orbit.
If the objects are in orbit around the sun then they are in the Solar System.
solar system
it keeps it in orbit
The term used for the sun and the objects that move around it is solar stem. This is what contains the other planets.
GRAVITY of course!
The gravitational force between the sun and each object in the solar system
A solar system.
If the objects are in orbit around the sun then they are in the Solar System.
solar system
Mass. There's a gravitational force of mutual attraction between every pair of mass objects. The mutual force of attraction between the sun and every orbiting object in the solar system is what keeps each one in its orbit.
The orbit
The sun
Gravity is the force which keeps them there.
Gravity keeps everything in orbit around the Sun.
it keeps it in orbit
The Sun's strong gravity keeps all the planets in orbit around it.
The Sun's Gravity