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Nicholas Copernicus 1473-1543 was a Polish priest and astronomer who created an alternative model of the planets which put the Sun at the centre, instead of the Earth as generally accepted at that time.
He knew it would get him into trouble with the church, and his book 'De Revolutionibus' was not published until the year he died. The theory with the Sun at the centre was similar to the old Ptolemaic system with its collection of circles and epicycles allowing for the changes in distance and the changes in planets' speeds, and their departure from the ecliptic.
In the late 1500s Tycho Brahe made new more accurate observations of the planets from Denmark, and these were used by Johannes Kepler to produce a new model published in 1609.
Kepler's model is the one we use today, and it has the Sun at the centre, like the Copernican model, but all the other details of Copernicus's theory were rejected in favour of elliptical orbits.
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What did Copernicus not reject?
Copernicus did not reject the idea that planetary orbits around our Sun were circular.
Keplers law that describes how fast planets travel at different points in their orbits is called the law of?
This is known as Keplers 2nd Law of Planetary Motion. It states that line drawn between a planet and the sun sweeps out equal areas during equal time intervals.
Copernicus heliocentric model failed to work as well as it might to predict the positions of planets because Copernicus insisted the orbits were?
He theorized that planetary orbits were circular - in fact, they're elliptical (elongated). He also theorized that the Sun was the center of the Universe, which of course it's not.
Why was Kepler not satisfied with the circle he calculated to fit most of the observed locations of mars?
The orbits of the planets, including Mars, are eliptical, not circular. Keplers observed positions did not fit a circular orbit. The differences led him to discover that the orbits were not circular, but eliptical.
Who was the astronomer that realized the sun does not orbits the earth?
It is believed that Nicolaus Copernicus first proposed the heliocentric theory.
How did keplers work improve on or support Copernicus heliocentric theory?
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
Concerning the planetary orbits why was Copernicus somewhat inaccurate?
He suggested the orbits were circles.
What did Copernicus not reject?
Copernicus did not reject the idea that planetary orbits around our Sun were circular.
Keplers law that describes how fast planets travel at different points in their orbits is called the law of?
This is known as Keplers 2nd Law of Planetary Motion. It states that line drawn between a planet and the sun sweeps out equal areas during equal time intervals.
Astronomer who realized the earth orbits th sun?
copernicus
How did Kepler expand on Copernicus' ideas?
Kepler showed that planetary orbits were actually ellipses, not circles as proposed by Copernicus.
What is the difference between Copernicus and Kepler description of planetary orbits?
Kepler realised the planets orbits are not circles; they are ellipses.
How did Kepler's work improve on or support Copernicus' heliocentric?
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
Which polish scientist argued that earth orbits the sun?
Nicholas Copernicus
How did Kepler's work improve on or support Copernicus's heliocentric theory?
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
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.
Who proposed the circular orbits of the planets around the sun in the 1500s?
Nicolas Copernicus.
