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Ptolemy
He thought that the Earth was at the center of the universe and that the other planets an the sun revolved around the Earth -
Dec 1, 1500
Brahe
He used large tools, such as a mural quadrant, to make detailed astronomical observations and to measure the positions of stars and planets -
Jan 1, 1543
Copernicus
He proved that the sun is at the center of the universe -
Kepler
Kepler was Brahe's assisstant and carried on his work. He stated 3 laws of planetart motion -
Galileo
One of the first to use a telescope. Discovered craters and mountains on the Earth's moon, four of Jupiter's moons, sunspots on the sun, and the phases of Venus. -
Newton
Created the laws o gravity and helped us better understand the observations of the earlier scientists -
Hubble
He proved that other galaxies existed beyond the edge of the Milky Way.
