1) The gravitational attraction between the planets and the Sun.
2) The "inertia" of the planets. That's their tendency to move in a straight line
unless a force (gravity in this case) acts on them.
Newton concluded that the combination of the gravitational force between the Earth and the Sun, and the Earth's inertia moving it in a straight line, keep the Earth in orbit around the Sun.
Galileo Galilei concluded that all planets must orbit around the sun after observing that Venus exhibited phases similar to the moon, which could only be explained if Venus orbited the sun.
Isaac Newton
He once saw an apple falling from a tree, and he wondered whether the force that pulled that apple to earth might also control the movements of planets. In the next 2o years, Newton perfected his theory. Using mathematics, he showed that a single force keeps the planets in their orbit around the sun. He called this force gravity (:
Isaac Newton stated that the universal law of gravitation keeps moons orbiting planets and planets orbiting the sun. This law describes how every mass attracts every other mass in the universe with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
gravity and inertia
I would have to go with Isaac Newton, who concluded that gravity was an inherent property of all mass.
Newton concluded that the combination of the gravitational force between the Earth and the Sun, and the Earth's inertia moving it in a straight line, keep the Earth in orbit around the Sun.
Newton concluded that the force of gravity between the planets and the Sun keeps them in orbit. This force is proportional to the product of their masses and inversely proportional to the square of the distance between them, as described by his law of universal gravitation.
Galileo Galilei concluded that all planets must orbit around the sun after observing that Venus exhibited phases similar to the moon, which could only be explained if Venus orbited the sun.
How is Newton's law of gravity related to the movement of the planets?
Gravity - combined with the Earth's inertia (its mass, and Newton's laws of motion).Gravity - combined with the Earth's inertia (its mass, and Newton's laws of motion).Gravity - combined with the Earth's inertia (its mass, and Newton's laws of motion).Gravity - combined with the Earth's inertia (its mass, and Newton's laws of motion).
It was Isaac Newton who figured out that the force of gravity keeps planets in orbit around the sun.
newton searched high and low with his telescope
people
Isaac newton :)
Sir Isac Newton was the scientist who discovered why the planets stay in orbit.