Astronomers
Published on Jan 04, 2016
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PRESENTATION OUTLINE
ARISTOTLE
- Argued that the universe was spherical and infinite
- Believed earth was also a sphere
- Believed there was a 5th basic element that was called aether
- One of his greatest contributions to science was challenging others ideas
Photo by Tilemahos Efthimiadis
ARISTARCHUS
- First to say the earth revolved on a axis
- Also said that the earth reveled around the sun
- Put his theory of the earths rotation out their
- 1750 years before it was proven by Copernicus
- Tried to measure the distance between earth and the sun
PTOLEMY
- Made a model of the movements of the solar system
- Made the first catalog to organize astronomical objects
- The model was called the Ptolemaic system
- It was the cornerstone of astronomy for 15 years
COPERNICUS
- He concluded that the sun was the center of the universe
- He kept the Ptolemaic system, but changed the way the orbited
- His ideas were not popular among churches
- Astronomers such as Brahe and Galileo helped to
- eventually prove that this model of the universe was correct
KEPLER
- He helped develop three laws of planetary motion
- His first law described the planters movement, the second
- about the distance from the sun, and third about the universal orbit
- He believed in the Copernican model of the universe,
- but thought that Mars did not fit in with it
GALILEO GALILEI
- He built himself a very high powered telescope for the time it was made
- He was able to see features on the moon, and stars in the Milky Way
- He also was able to see four moons orbiting Jupiter, called the Galilean Moons in honor of him
- He believe in the Copernican model, which frightened the Church,and put him in trial in 1633
- He was held under house arrest for the rest of his life after the trial
NEWTON
- Used the math he discovered to describe the models of Copernicus and Kepler
- Discovered the Theory of Universal Gravitation
- That theory was the foundation to Kepler's theory of planetary motion
- His astronomical theory, was found to be applicable to the earth
- His theory were so accurate that they still are used today
HUBBLE
- He discovered that far way galaxies are moving away from us
- Known as Hubble's Law
- The law describes that galaxies recede at a certain rate from each other
- His theory is the cornerstone of the Big Bang model of the universe
