The planets turn about their axes (rotate), and move in orbits about the sun (revolve). They are all in dynamic motion all the time. Welcome to the music of the spheres. Planets (all of them) are continually in motion. They all revolve on their axes and move about the sun in their orbits. This is the music of the spheres.
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.
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 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.
Sir Isac Newton was the scientist who discovered why the planets stay in orbit.
The sun has such a strong gravitational field that it pulls the planets towards it with incredible power, however, the planets are moving at enormous speeds away from the sun. These two forces which are acting in a perpedicular angle create something we physist call an "orbit". The planets and moons which revolve around planets have this effect.
Because they're in the gravitational pull of the sun known as orbit
For a planet to stay in it's orbit the forces must be in balance.
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Planets stay in orbit around the sun due to the gravitational force exerted by the sun. This force keeps the planets moving in a curved path, balancing the inward pull of gravity with the outward momentum of the planet's motion. This dynamic equilibrium ensures that the planets continue to revolve around the sun in stable orbits.
Unless acted on by an external force, yes.
It's weight
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