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1300 BCE
Claudius Ptolemy He believed that the Earth was the center of the Universe
important because he was a original contributor for details about motion of the planets -
Period: 250 BCE to 250
Eratosthenes He found the circumference of the Earth
important because he was the first to with such accuracy -
1508
Nicolaus Copernicusestablished that the planets orbited the sun rather than the Earth
important because changed the way people viewed the relationship between the sun and earth also challenged catholic beliefs -
1570
Tycho Brahework helped overturn that belief in favor of a heliocentric model of the universe, with the sun at the center
important because he taught Kepler who influenced newtons work -
Johannes Kepler famous laws of planetary motion
important because the first law says planet speed varies as it circles the sun, the second law says that all planets move in Ann out at equal distance, the third law says the average distance of a planet from the sun cubed is directly porportional to the orbital period squared. These laws shaped further inquiry in to space -
Sir Isaac Newton developed the theory of gravity, the laws of motion
important because they tie in to almost everything we see in everyday li -
Albert Einstein :His research spanned from quantum mechanics to theories about gravity and motion
important because changed the way we proceed gravity