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195 BCE
Erathosthenes
(276-195 B.C.) Used the sun to measure the size of the round earth. This is important because many people thought the Earth was flat at this time period. -
168
Caludius Ptolemy
(A.D. 90-168) Made a model of the solar system. This was important because his solar system included the sun, stars, and other planets revolving around the Earth; "This is flat wrong" (NASA). -
1543
Nicolaus Copernicus
(1473-1543) Made a solar system where the Earth revolved around the sun. This is important because it changed the way many people viewed the Solar System. -
1546
Tycho Brahe
(1546-1600) He had the most accurate celestial observations. This is important because he challenged the belief in how the universe was organized. -
Johannes Keepler
(1571-1630) Calculated 3 laws of motion that people use today. This is important because scientist also still use these today. -
Sir Isaac Newton
(1643-1727) He specialized in gravity and other special forces, during this he created 3 laws describing the motion of forced between objects. This is important because his research created Newton's Laws, which are still used by scientist today. -
Albert Einstien
(1879-1955) He suggested that the laws of physics were the same throughout the universe; he also stated that space and time are equal, known as space-time. This is important because it expanded the "mans" view of the universe.