1 of 11

Slide Notes

DownloadGo Live

Astronomers

Published on Dec 15, 2015

No Description

View Outline

MORE DECKS TO EXPLORE

PRESENTATION OUTLINE

1.

ASTRONOMERS

Kaitlin Roberts Hour 1
2.

ARISTOTLE

  • 384-322 BCE
  • Thought Earth was the center of all things (geocentric)
3.

ARISTARCHUS

  • about 310-230 BCE
  • Proposed a heliocentric model of the solar system
  • Tried to measure distance to moon and sun
4.

PTOLEMY

  • About 100-170 CE
  • Developed a detailed geocentric model
  • Tried to explain the retrograde motion of planets
  • Planets appear to move backwards in the sky
  • "Wheels on wheels"
5.

Nicolaus Copernicus

  • 1473- 1543
  • Heliocentric model in which all planets are circular
  • Perfect circular orbits
6.

JOHANENES KEPLER

  • 1571-1630
  • Formulated three principals, Kepler's Laws
7.

GALILEO GALILEI

  • 1564-1642
  • Observed that Earth was not the only object that could be orbited
8.

ISAAC NEWTON

  • 1643-1727
  • Discovered the law of gravity
9.

EDWIN HUBBLE

  • 1889-1953
  • Discoveed galaxies
  • Formed the Big Bang Theory
10.

GEOCENTRIC MODEL

  • Models that use Earth as the center
11.

HELIOCENTRIC MODEL

  • Models that use the sun as the center

Kaitlin Roberts