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Kepler's Laws of Planetary Motion:
1] Each planet moves in an elliptical orbit with the sun at one focus
2] The line form the sun to any planet sweeps out equal areas of space in equal time intervals
3] The squares of the times of revolution (days, months or years) of the planets are proportional to the cubes of their average distances from the sun.
Kasandra Hegmann
Wiki User
∙ 9y agoKepler's three laws of planetary motion describe the orbits of the planets, and Kepler's model is the one that is generally used today.
The three laws describe the shape of a planet's orbit, how the planet's speed varies as it goes round an orbit of a given shape, and how quickly the planet completes an orbit of a given size.
The first major model was that of Claudio Ptolemy who placed the Earth at the centre, but as a result of this he was forced to use somewhat complicated geometric paths to explain the observed positions of the planets, especially the inner planets.
The model used combinations of circles and epicycles, and in this respect it was similar to the next model, published by Copernicus in 1543. The model put the Sun at the centre and as a result the orbits were geometrically less complicated. Galileo supported this model.
At the end of the 1500s Tycho Brahe made a series of more accurate measurements of the planet's positions over a period of time, and Johannes Kepler acquired the results after Tycho's death in 1601.
Kepler's model (1609) kept the Sun at the centre but introduced the novel idea of elliptical orbits. He showed that his model represented the planets' positions more accurately (when compared with observations) than the earlier models.
The above three models were alternative ways of describing the planets' positions as observed, and none of them attempted to give reasons for the planets' behaviour. However Newton's book 'Principia' gave details of the theory of gravity and the laws of motion, and he was able to show that a planets moving under the Sun's gravity must follow an elliptical orbit.
So Kepler's model was eventually given a theoretical backup and the two earlier models were discarded.
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According to Keplers second law Pluto will be travelling fastest around the sun when?
... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)
What stated the planets moved in elliptical orbits around the sun?
This is Kepler's First Law.
Who discovered the elliptical path of the planets?
17th century astronomer Johannes Kepler discovered the elliptical shape of the planets' orbits around the Sun, which he described in his first law of planetary motion. Newton later explained this in his law of universal gravitation.
Who discovered ellipses?
The ellipses were discovered in the 17th century by one Johannes Kepler. Johannes Kepler discovered that the orbits along which the planets travel around the Sun are ellipses with the Sun at one focus, in his first law of planetary motion.
How does newtons first law explain keplors first law?
Newton's first and third laws of motion don't contribute anything to an understandingof Kepler's laws of planetary motion.Kepler's laws can be derived from Newton's law of universal gravitation, along with hissecond law of motion.
What does Kepler first law state?
Kepler's 1st law of planetary motion state that Each planet moves in an elliptical orbit with the sun at one focus.
How did Kepler's deviate from the beliefs of Aristotle and Copernicus in his first law?
it was different
According to Keplers second law Pluto will be travelling fastest around the sun when?
... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)... when it is closest to the Sun. (Kepler's Second Law)
What is Kepler's first law states that the orbits of the planets around the Sun?
Kepler's 1st law states that the orbits of the planets around the sun and makes an ellipse. This is taught in astronomy.
Astronomer who discovered that planets orbit the sun in an ellipse rather than a perfect circle?
Johannes Kepler
What stated the planets moved in elliptical orbits around the sun?
This is Kepler's First Law.
What law announced by Kepler was supported by newtons law?
All 3 of them (Kepler's laws of planetary motion).
Is the semi-major axis concept an important part of Third Law of Motion?
Yes, in Kepler's Third Law, it is used to calculate the periods of planets.Yes, in Kepler's Third Law, it is used to calculate the periods of planets.Yes, in Kepler's Third Law, it is used to calculate the periods of planets.Yes, in Kepler's Third Law, it is used to calculate the periods of planets.
Who discovered the elliptical path of the planets?
17th century astronomer Johannes Kepler discovered the elliptical shape of the planets' orbits around the Sun, which he described in his first law of planetary motion. Newton later explained this in his law of universal gravitation.
Which law states that each planet revolves so that an imaginary line connecting it to the sun sweeps over equal areas in equal time intervals?
That's one of Johannes Kepler's "Laws" of planetary motion.
Who discovered that planets have elliptical orbits?
Johannes Kepler proposed that these planets orbit the sun in ellipses, not circles. That is why we have Kepler's Law of Planetary Motion.
Who discovered ellipses?
The ellipses were discovered in the 17th century by one Johannes Kepler. Johannes Kepler discovered that the orbits along which the planets travel around the Sun are ellipses with the Sun at one focus, in his first law of planetary motion.
