Who was the first scientist to theorize that planets move around the sun in elliptical orbits?
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What evidence do you have that the planets move in elliptical orbits around the sun and not in circular orbits?
Elliptical orbits of the planets around the sun actually match whatwe observe. Newton's Theory of Universal Gravitation states thatplanets will move around the sun in elliptic…al orbits.
No, that was done by Johannes Kepler.
I am not sure about the second factor, but the first is gravity. Classically we would think of the planets taking a curved path through space, due to the force of gravity betw…een them and the sun. In the relativistic view, the planets actually travel in a straight line, but through a space-time which is curved by the masses therein. Either way, the planets' elliptical orbits are due to gravity. The other factor could be inertia? As long as nothing gets in their way, there is nothing to stop them from going forward in their orbits.
That theory is supported by observation, and is predicted by other theory that is confirmed by both observation and experiment. 1). A system of planets moving around the …sun in elliptical orbits is the simplest structure that produces the motions of the planets that we actually see in the sky. ( demonstrated by Kepler, working with Tycho's observational data) 2). A theory of universal gravitation, proportional to the product of masses and inversely to the square of the distance between masses, predicts that planets will move around the sun in elliptical orbits. (Newton)
This is Kepler's First Law.
kapler Johannes Kepler discovered that planet orbits are elliptical. Johannes Kepler he was Tycho Brahe's (Bra-hay) assistant, although after he
All of them do.
Who theorized that the moon the sun and the planets moved in a perfectly circular orbits around the earth?
The theory was officially written down by Plato, teacher of Aristotle, in 4th century B.C. Most ancient Greek astronomers followed the lead. The most recent well-known astrono…mer to hold to the theory was Tycho Brahe, in 16th century A.D. He created a revised geocentric model which explained the motion of planets pretty accurately, but the motion paths were much more complicated than the heliocentric model.
Aristarchus of Samos
Johannes Kepler did this important work at the start of the 1600susing accurate observations made by his employer, Tycho Brahe.
It was Claudius Ptolemy, 98-160. His Ptolemaic system describingthe planets' movements among the stars was generally accepted forabout 1400 years. Until the computer age, the …Ptolemaic model wasalso used in planetariums.
Copernicus produced the first heliocentric theory in 1543. It usedcircles and epicycles, like the ancient Ptolemaic theory that hadthe Earth at the centre. Later after accurat…e measurements by Tycho, Kepler discovered thata better model for a planet's orbit would be an ellipse with theSun at one focus. His theory came out in 1609. No-one knew which of the theories was right except that Kepler'swas a little more accurate. But in the late 1600s Newton came upwith discoveries that confirmed that Kepler's theory was consistentwith new physical theories. This is the model used now.