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Astronomers
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Published on Nov 22, 2015
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1.
ASTRONOMERS
2.
ARISTOTLE
(384-322 BC)
A shift in a position of an object when viewed from diffrent location is known as parallax
He discovered the geocentric model were the earth was in the middle
3.
Aristarchus
He was alive between (310-230BCE)
He tried to find the distance from the earth to the moon...
And the earth to the sun
He came up with the heliocentric model were the sun...
Was in the middle
4.
Ptolemy
100-170CE
He thought that the planets moved on small circles that moved on bigger circles.
He thought of the wheels on wheels model
He observed planets in the sky moving backwards
5.
NICOLAUS COPERNICUS
1473 -1543
He also made a wheels on wheels system but his system fit better
Heliocentric
He said that planets made perfect circles around the sun.
6.
JOHANNES KEPLER
1571-1630
He came up with the kepler laws.
First law states that plnetary orbit are ellipses with the sun at one focus.
The second law states that planets in there orbit moves faster when..
They are closer to the sun
7.
GALILEO GALILEI
1564-1642
He observed three other moons
This showed that earth is not the only thing that can be orbited
This help support the heliocentric model
8.
ISAACNEWTON
1643-1727
He came up with the newton laws
If something is not moving it cant move unless pushed by something else
9.
EDWIN HUBBLE
1889-1953
He made the hubble telescope.
10.
GEOCENTRIC
The geocentric model is were the earth is in the middle of the solar system
11.
HELIOCENTRIC
It is were the sun is in the middle Of the solar system
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