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240 BCE
Eratosthenes
- Calculated circumference of Earth
- 240 BC
- It gave an idea of how big the Earth actually was
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150
Claudius Ptolemy
- Geocentric Theory
- 150
- He developed the first model of the solar system
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1504
Nicolaus Copernicus
- Everything in the solar system revolved around the sun 2.1504
- It was important because it changed the way people though about the solar system
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1572
Tycho Brahe
- Discovered a Supernova and proved it wasn't an atmospheric object
- 1572
- It proved the universe could change
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Johannes Kepler
- Kepler's Laws of Planetary Motion
- 1605
- It fixed many problems with understanding of the solar system at the time
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Isaac Newton
- Gravity
- 1666
- It helped prove all objects are subject to the force of gravity
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Albert Einstein
- Theory of Relativity
- 1905
- It improved the study of particles and how they interacted along with bringing in the nuclear age