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Johannes Kepler, using measured planetary positional data provided by Tycho Brahe, showed that the orbits of the planets were ellipses ("flattened circles"), with the Sun at one focus of the eliipse.
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Why are some planets near the sun and some others far from the sun?
Near (in order from closest to farthest): Mercury, Venus, Earth, and Mars Far (same order as before): Jupiter, Saturn, Uranus, and Neptune. Why? I suppose that's just how things worked out when the planets formed from the "protoplanetary disk". The planets have to be spaced apart enough to form stable orbits. Otherwise their mutual gravitational attraction could disrupt their orbits.
Who worked out the arrangement of the known planets in your solar system and how they move around the sun?
i did
Which astronomer discovered the orbit of planets?
Newton Copernicus is credited for hypothesizing the heliocentric solar system. Kepler had the equations to determine the orbits, but didn't know "why" these figures worked. Galileo's observations confirmed these things, but it was Newton's laws of motion that explained the "why."
What geometric arrangements did ptolemy use to explain retrograde motion?
Earths faster motion makes Mars appear to be going backwards, the backwards motion, in fact, is what caused retrograde motion. --Ptloemy used Epicycles to explain how geocentrical models worked.
What other jobs did Nicolaus Copernicus do?
Nicolaus worked for his uncle as a physicain and security.
Who was the scientist that worked out the general rules for the orbits of the planets?
I think it was gallilao or Issac newton
What did Kepler discover about the shapes of the planets' orbits?
He discovered that they were not perfect circles. Also, he was pretty good a math, and devised what are known as "Kepler's Laws of Planetary Motion," by which you can predict the movement of the planets based on their orbital distances and speeds.He worked out that the planets revolve round the Sun in elliptical orbits, with the Sun at one of the two foci.
Kepler's first law worked where Copernicus' original heliocentric model failed because Kepler described the orbits as?
Copernicus's theory did not fail but it was not as accurate as the Kepler model because it did not include elliptical orbits for the planets, as Kepler's model did. However the data for calculating the elliptical orbits did not become available until well after Copernicus's death so he had no chance of knowing about this change. Copernicus's model which used circles and epicycles was accurate to the standard of the observations that were available to him.
Why are some planets near the sun and some others far from the sun?
Near (in order from closest to farthest): Mercury, Venus, Earth, and Mars Far (same order as before): Jupiter, Saturn, Uranus, and Neptune. Why? I suppose that's just how things worked out when the planets formed from the "protoplanetary disk". The planets have to be spaced apart enough to form stable orbits. Otherwise their mutual gravitational attraction could disrupt their orbits.
Who determined the nature of the force that kept planets in their orbits?
Isaac Newton. Strictly speaking, he said gravity was the force, but he didn't explain how it worked. Nowadays, Einstein's ideas are the best explanation we have of what gravity is.
What did Johannes Kepler discover about the motion of the planets?
Through years of research, and a lot of trial and error, Kepler was able to show that three laws accurately describe planetary motion. He was never able to explain WHY these laws worked, he only knew they DID.
Why has it historically been so difficult to predict the positions of the planets on the night sky?
It was always a difficult problem in 3D geometry especially when it was believed that the Earth was at the centre of the Universe. To model the problem the ancient Greeks came up with a model of circles and epicycles that worked pretty well in predicting the planets' positions. Copernicus produced an alternative system of circles and epicycles in the 16th century that had the Sun at the centre, which caused raised eyebrows in some places, but as long as it was used and taught as 'only' a theory, no objections were made. Copernicus's model also made predictions that were pretty well confirmed by observations. By the beginning of the 17th century (1600) discrepancies were being noticed. The matter was propelled forward by Tycho Brahe who built some of the best measuring equipment so far seen, and his observations were taken up by his mathematical asistant Johannes Kepler. After long calculations on the orbit of Mars Kepler came up with the new theory that the planets have elliptical orbits. Mars was the best orbit to study because the eccentricity of the orbit is the highest of those planets that are commonly observed. Kepler also assumed the Sun was at the centre. The reason it took 1500 years to find the solution to the problem was that most of the planets have orbits with low eccentricity, which means that they are almost indistinguishable from the eccentric circles provided by the old model with circles and epicycles. For example the Earth's orbit has a minor axis that is only 0.014% smaller than the major axis.
How do you get a snake off your head in Minecraft Mo' Creatures?
You just run around in circles. Worked for me
Who worked out the arrangement of the known planets in your solar system and how they move around the sun?
i did
Who worked with clifford shaw and created a map of Chicago's social characteristics?
Henry McKay and it was concentric circles
Who developed the theory that the earth revolves around the sun.?
Copernicus produced the first full model of the planets with the Sun at the centre. It resembled the old geocentric Ptolemaic system with orbits based on circle and epicycles, but Copernicus's model was simpler in the fact that the epicycles for the inner planets were much reduced in size. His model was published in 1543. Tycho Brahe produced a geocentric model that had Mercury and Venus orbiting the Sun, in the late 1500s. Johannes Kepler worked on a new model based on Tycho's observations, and he hit on the idea that the planets' orbits are elliptical with the Sun at (or near) the centre. His work was published in 1609. All these models were purely phenomenological, they only attempted to describe the observed motion of the planets as accurately as possible. But in the late 1600s Isaac Newton made theoretical discoveries that led him to explain the planets' elliptical orbits in terms of the laws of motion and the law of gravity. Newon's theory was published in 1687. Since then the Kepler model with Newton's theoretical backup has become the accepted model.
How did corpernicus think the solar system worked?
The Copernican Theory said that the Sun was the centre of the solar system, not the Earth. The only error he made was that the orbits were perfectly circular. Keplar corrected this by showing the orbits were ellipses.
