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astronomers
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| astronomer | what he did |
|---|---|
| Kepler | took Brahe observation and used it to help copernicus sun centered solar universe . |
| copernicus | created to heliocentric theory/law |
| Brahe | tried to prove copernicus wrong but his observation proved himself wrong |
| Ptolemy | thought that the earth was in the center of the universe |
| Galileo | made better telescope and found that venus had phases just like the moon and found that jupiter has four moons. |
| Newton | used that gravity keep all the planters in their path and inertia help it mvd around in circles |
| Hubble | made the Hubble satellite and figured out that the milky way galaxy isn't the only galaxy in the universe |