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Famous Astronomers

Published on Nov 25, 2015

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PRESENTATION OUTLINE

1.

ARISTOTLE

  • Greek philosopher
  • 384-322 BCE
  • Observes that the stars surround the Earth
  • Parallax
Photo by Roanish
2.

ARISTARCHUS

  • Greek astronomer
  • 320-230 BCE
  • Heliocentric model of the universe
Photo by davedehetre
3.

PTOLEMY

  • Egyptian astronomer
  • 100-170 BCE
  • Geocentric model
  • "Wheels on wheels" system- planets travel in circles
Photo by vituh
4.

COPERNICUS

  • Polish astronmer
  • 1473-1543
  • New heliocentric system
  • Continued on perfect circle planetary paths idea
Photo by nojhan
5.

KEPLER

  • German mathemetician
  • 1571-1630
  • Showed that the planets don't travel in circles
  • Kepler's laws
Photo by Arenamontanus
6.

GALILEO

  • Scientist
  • Improvements to telescope
  • Observed moons
  • 1564-1642
Photo by Reverend Aviator
7.

NEWTON

  • Scientist
  • 1642-1727
  • Discovered gravity
  • Moon orbits Earth because of gravity
Photo by VinothChandar
8.

HUBBLE

  • American astronomer
  • 1889-1953
  • Recessional gravity
  • Researched other galaxies
Photo by Cyrus II

Katie Ward