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astro100611 - Astronomy Oct 6th 2011 Galileo Father of...

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Astronomy Oct. 6 th , 2011 Galileo “Father of Science” Ehhhh, not reaaaally... But he's up there! Telescope invented in 1608 (Hans Lippershey) Galileo built his own telescope and was the first to use it for science Review! Kepler knew about the work of astronomers that studied the sky before his time. Which of the following people provided the most important information for Kepler? >Tycho Brahe Kepler's breakthrough... Struggled to explain Brahe's observations with circular orbits and failed, particularly in the case of Mars Looking at Brahe's data, Kepler had to make a judgement call: DID BRAHE GET THE MEASUREMENTS RIGHT? Could his data be trusted? Brahe's observations showed worrisome discrepancies with the predictions of Copernicus or Ptolemy With elliptical orbits, all planetary motions could be explained and predicted precisely! An ellipse is a special type of oval... A circle is defined by its center and its radius An ellipse is defined by its foci and its major/minor axes A circle is a special type of ellipse...
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