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Ptolemy an earth centered universe
Ptolemy wrote a book with all of the ancient knowledge of astronomy that he could find, he used mathematical calculations which he called Ptolemaic theory. He thought the Earth was at the center of the universe and the other planets and the sun revolved around the earth, even though it was wrong he predicted the motions of the planets better then any other theory. -
Jan 1, 1543
Copernicus
According to Copernicus's theory, the sun is at the center of the universe and all of the planets, including the Earth, orbit the sun. When copernicus's thoery was excepted it was known as Copernican revolution. -
Jan 1, 1580
Tycho Brahe a wealth of data
His theory was the sun and the moon revolved around the earth and that the other planets revolved around the sun. -
Johannes Kepler laws pf planetary motion
kepler figured out all the planets revolve around the sun in elliptical orbits and that the sun is not in the exact center of the orbits -
Galileo turning a telescope to the sky
Galileo discovered craters and mountains on the earth's moon, four of Jupiters moons, sun spots on the sun, and the phases of venus. -
Isaac Newton the laws of gravity
Isaac Newton discovered that all objects in the universe attract each other through gravitational force. -
Edwin Hubble beyond the edge of the milky way
Edwin Hubble proved that other galaxies exsisted beyond the edge of the milky way. -
Period: to
astonomy
