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Actually Nicholas Copernicus did, but he was afraid unlike Galileo Galilei and Nicholas published his findings when he was close to death he knew his beliefs would get him in trouble with the Roman Catholic Church. Galileo did make a telescope and discovered Jupiter had moons that went around it and used it as proof. In the end of his life when he was older he was put under house arrest. His assistant was able to trick the guards and smuggle his book to get published.
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∙ 12y ago
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∙ 12y agoJohannes Kepler and with observations from Galileo Galilei in the 1500's
Kepler originally rejected the idea that the planets were not in perfectly circular orbits but no theory explained their motion better.
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∙ 14y agoGreek discovered the planets to be round ... also discovered the first 5 planets in the sky.
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∙ 14y agoDavid nargino
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∙ 11y agogalileo galilei
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∙ 12y agoceparnecuse
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∙ 11y agogalilao
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What was Ptomeny trying to explain in his model by having the planets move on smaller circles that move on bigger circles?
to explain the motion of planets, especially the phenomenon of retrograde motion where planets appear to temporarily reverse their direction of motion. Ref: Andrew Liddle "An Introduction to modern Cosmology".
Which planets move in an elliptical orbit?
All the planets move with an elliptical orbit, but with a very low eccentricity.
Do stars move in circles during the night?
stars don't move, the earth does.
What would happen if the planets did not move in their fixed path?
If the planets did not move in their fixed orbits they may dash each other.
How do the planets move in the solar system?
The sun's gravity pulls the planets around it.
What was ptolemys explanation for why the planets seemed to move at different speeds?
The planets move on little circles that move on bigger circles.
Who astronomer disproved the idea that planets move in a circular orbit?
kepler
He developed the theory that planets move in concentric circles around the earth?
AAristotle developed the theory that planets are spheres and move in concentric circles around the sun
What was Ptolemy trying to explain in his model by haven't the planets move on smaller circles that move big circles?
ptolemy did something
Who was the German astronomer who proved that the planets move in oval paths called ellipses?
Johannes Kepler
What was Ptomeny trying to explain in his model by having the planets move on smaller circles that move on bigger circles?
to explain the motion of planets, especially the phenomenon of retrograde motion where planets appear to temporarily reverse their direction of motion. Ref: Andrew Liddle "An Introduction to modern Cosmology".
Do planets move in elliptical orbits?
The planets move intheir ellipticalorbits becauseof the gravitation of the Sun combined withthe inertial velocity of the planets(tangentialto their orbital paths). Mathematics shows the resulting orbits must be ellipses. (Some of the ellipses are in factalmost circles.)
What was ptolemy trying to explain in his model by having the planets move move on circles that move on bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
How did Kepler improve Copernicus theory?
He discovered that planets move in ellipses not circles and that the sun stays in it's own place.
What was Ptolemy trying to explain in his model by having the planets move on smaller circles that move on the bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
What was ptolemy trying to explain in his model by having the planets move on smaller circles that move on bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
Do water particles move in large circles true or false?
Water particles move in circles
