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History of Astronomy Aristotle 380 B. C. Earth Centered Universe Stars & everything else orbited earth. Saturn. Jupiter. Mars. Sun. Venus. Earth-(center). Moon. Mercury. Ptolomy : Greek Astronomer (140 CE—150A.D.). Earth Centered Solar System (Ptolomy). Saturn. Jupiter. Mars. Sun.
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Earth Centered UniverseStars & everything else orbited earth. Saturn Jupiter Mars Sun Venus Earth-(center) Moon Mercury
Earth Centered SolarSystem(Ptolomy) Saturn Jupiter Mars Sun Venus Earth-(center) Moon Mercury
Columbus:Sailor (1492 A.D.) Sailed around the Earth-It was “NOT” square & flat.
Sun Centered SolarSystem(Copernicus) Saturn Jupiter Mars Moon Earth Venus Sun-(center) Mercury
Johannes Kepler: (German) Not Circular orbits Oval or Ellipse Orbits
Galileo: Astronomer (1609 A.D.) Italian Another technological device being used.
Jansky 1931--Built the 1stRadio telescope--better technology
Hubble 1924--1stSpaceTelescope 1- showed other galaxies existed beyond the edge of the Milky way; 2- Confirmed that the universe is much larger than our galaxy—that the universe is expanding and an getting bigger.