This is Kepler's First Law.
Johannes Kepler proposed the idea that planets revolve around the sun in elliptical orbits in his laws of planetary motion. This idea challenged the prevailing belief at the time that the Earth was the center of the universe.
Johannes Kepler was the first to state that planets move in elliptical orbits.
Ferme
In ancient Greece, the astronomer Ptolemy proposed the geocentric model, which stated that the planets revolved around the Earth. This model was widely accepted for centuries until it was ultimately replaced by Nicolaus Copernicus' heliocentric model, which placed the Sun at the center of the solar system.
Terrestrial planets move faster in their orbits because they are closer to the Sun. Isaac Newton, who discovered the effects of gravity, stated that gravity gets stronger the closer you get to a large, massive body (like the Sun) - and this makes the planets orbit faster than the outer planets, where the force of the Sun's gravity is less. Their orbits are also smaller, so it takes less time for them to go around the Sun.
Johannes Kepler proposed the idea that planets revolve around the sun in elliptical orbits in his laws of planetary motion. This idea challenged the prevailing belief at the time that the Earth was the center of the universe.
He is a danish astronomer who stated that all the planets revolve around the sun in elliptical orbits and that the sun is not in the exact center of the orbit.
Johannes Kepler was the first to state that planets move in elliptical orbits.
Ferme
Its Orbit.Johannes Kepler (Germany), who lived between the time of Copernicus (Poland) and Isaac Newton (England), correctly postulated that all of the sun's planets indeed revolve about the sun in orbits which have the shape of an ellipse, with the sun at one focus of the ellipse. Isaac Newton, in his Principiae Mathematica, further stated, essentially, that any planet orbiting any star, or any moon orbiting any planet, would follow an elliptical path.
Johannes Kepler stated that the planets revolve around the sun in an ellipse.
In ancient Greece, the astronomer Ptolemy proposed the geocentric model, which stated that the planets revolved around the Earth. This model was widely accepted for centuries until it was ultimately replaced by Nicolaus Copernicus' heliocentric model, which placed the Sun at the center of the solar system.
he stated that planets went around the sun
The person who first stated this was Johannes Kepler.
Galileo Galilei
Kepler
Terrestrial planets move faster in their orbits because they are closer to the Sun. Isaac Newton, who discovered the effects of gravity, stated that gravity gets stronger the closer you get to a large, massive body (like the Sun) - and this makes the planets orbit faster than the outer planets, where the force of the Sun's gravity is less. Their orbits are also smaller, so it takes less time for them to go around the Sun.