The simple answer is gravity.
An apple is dropped and it falls towards the Earth. If you throw it, it travels away from you, but also eventually falls towards the Earth. Throw it harder and it travels further, but also eventually falls towards the Earth.
Now throw it hard enough so it travels beyond the horizon, it's always falling slowly towards Earth, but by the time it's dropped a little the ground has moved away from it thanks to the curve of the Earth. So it keeps going and keeps falling.
That is what's happening to the moon. It's constantly falling towards us, but won't hit for a very long time.
And that is what's happening to the Earth around the Sun. And every other planet around the Sun. And the Sun around our galaxy, the Milky Way. And the Milky Way? It's floating around other galaxies.
The gravitational force exerted by the Sun keeps all the planets in their orbits. This force balances the planets' tendency to move in a straight line and keeps them moving in elliptical orbits around the Sun.
Gravity
It isn't actually a who, but a what. That what is Gravity.
The gravitational pull of the sun keeps the planets in orbits... Although some people think it is magnetism....
gravity
Planets orbit the sun because gravity keeps them from escaping, and momentum keeps them moving forward. The orbits are elliptical, which is like an oval.
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.
Its gravity keeps them in their orbits, just like all the objects in the solar system.
The force of the Sun's gravity keeps them in their orbits.
Gravitational force is what holds all the planets in their orbits around the sun. This force is determined by the mass of the objects and the distance between them. The gravitational pull of the sun keeps the planets in their respective orbits.
Gravity is the force that keeps the planets in their orbits around the sun. It pulls the planets towards the sun, while their forward motion keeps them from falling into it. Gravity also influences the shape and stability of the planets' orbits.
The force of gravity between the planets and the sun keeps them in their respective orbits, maintaining their approximate distances from each other. This gravitational force acts as a centripetal force, balancing the planets' inertia and keeping them in stable orbits around the sun.