Gravity from the Sun holds the planets in their orbits.
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.
The force of the Sun's gravity keeps them in their orbits.
The force of gravity causes orbits.
i think its is by the force of gravity planets are kepet orbit
The force you seek is gravity.
gravity
inertia
Centripetal force and Gravity
It is gravity that holds the planets in their orbits around the sun. Gravity is what gives "shape" to the solar system, to galaxies, and is the large-scale organizer of the universe as a whole.
Planets and moons remain in their orbits because of the gravitational pull other bigger planets or stars have on them, for example the Earth stays in its orbit because of the gravitational force it is subjects to created by the Sun, and the moon stays in its orbit because of the gravitational force it is subject to created by the Earth. It's all about gravity and force.
Literally a solar system has the Sun at the centre because solar means 'of the Sun'. But to have a system of planets you need something massive at the centre to provide the gravitational force to control the orbits. Without that, the planets will just go off in straight lines.
The attracting force for mass over large scales is the force of gravity. The mutual attraction between the Sun and planets keeps the latter in fairly stable orbits.