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Astronomers

Published on Nov 24, 2015

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1.

ARISTOTLE

  • He lived 384-322 BCE
  • He thought that the earth was the center of all things.
  • He thought that if earth went around the sun,-
  • Then the positions of the stars would change.
2.

ARISTARCHUS

  • He lived 310-230 BCE
  • He attempted to measure the relative -
  • Distance to the moon and sun.
  • Contributed to the use of observation and geometry.
3.

PTOLEMY

  • He lived about 100-170 CE
  • He developed a detailed geocentric model.
  • He believed that a celestial body traveled -
  • At a constant speed in a perfect circle.
4.

COPERNICUS

  • He lived 1473-1543
  • He formed a heliocentric model.
  • He put the sun in the center of all things instead of the sun.
  • Used perfect circles for orbits.
5.

KEPLER

  • He lived 1571-1630
  • He created the laws of planetary motion.
6.

GALILEI

  • He lived 1564-1642
  • He improved the telescope
  • He confirmed the phases of Venus.
7.

ISSAC NEWTON

  • He lived 1642-1727
  • He created Newtons three laws.
  • He formulated the laws of motion.
8.

HUBBLE

  • He lived 1889-1953
  • He discovered a galaxy beyond the Milky Way.
  • He created Hubble's Law
9.

GEOCENTRIC SOLAR SYSTEM MODEL

  • States that earth is the orbital center of all
  • Celestial bodies.
10.

HELIOCENTRIC MODEL

  • The astronomical model in which the earth and planets
  • Revolve around the sun.

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