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Bibliography (feb 28, 1630 – aug 28, 1650)

Description:

“Kepler.” Kepler - Philosophy of Cosmology, philosophy-of-cosmology.ox.ac.uk/kepler.html.

“Planetary Motion: The History of an Idea That Launched the Scientific Revolution : Feature Articles.” NASA, NASA, earthobservatory.nasa.gov/Features/OrbitsHistory/page2.php.

Added to timeline:

Date:

feb 28, 1630
aug 28, 1650
~ 20 years