Sir Isac Newton was the scientist who discovered why the planets stay in orbit.
Jordan Grant & Leshonte Missick
For a planet to stay in it's orbit the forces must be in balance.
ANSWER Sir Isak Newton was the first person to realise that the force of gravity was universal. It is Kepler motion that describes the elliptically orbits of the planets.
Nicolaus Copernicus discovered why planets stay in orbit when he found that the planets revolve around the sun. He is credited with starting the Scientific Revolution through this discovery.
It's weight
all
The planets stay in orbit because of the gravitational attraction between the individual planets and the sun. Their rotational velocity makes them stay in a stable orbit instead of spiraling into it.
Because of the laws of gravity.
Sir Isaac Newton showed that all objects in the universe attract each other through gravitational force, in other words, he was the one that showed that planets and moons stay in orbit due to gravity :)
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.
because the planets' gravity pull them so that they do not go away and the moons revolve around them with a constant speed so they stay in their orbit
The Sun stays in orbit because of gravity. This is also why all the planets stay in orbit too. Gravity pulls the planets towards the Sun. Without gravity, the planets would be wandering all over the universe.