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Sep 18, 1000
equenox
when light and dark are the same amount of hours -
Sep 18, 1530
heliocentric
Nicholas Copernicus made a model that discribed planetary motion simpler than the geocentric -
Sep 18, 1543
Copernicus
found that the sun was in the center ofthe univers not the center of the earth -
teloscope
first way to veiw montain of the moon on the sides of saturn -
geocentric
aloud early astronomers to forcast things like the phases of the moon