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100
Ptolemaic Model
Claudius Ptolemy made a model of the solar system. the model accounted for the motions of planets. -
Period: 100 to
Science
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Jun 1, 1543
Copernicus
Copernicus says the sun is the center of the universe. -
Galileo's observations
Galileo began his observation of Venus. -
Henrietta Leavitt
She published a table of 25 different cepheid variable periods. -
Hubble discovers distance of star
Hubble spotted a star known as the Andromeda Nebula. Using Leavitt's techniques he showed the star was 1 million light years away.
