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Made he geocentric theory, with planets floating in perfect circles around the sun (not exact but big step)


Supported Copernicus, and noted that Jupiter had 4 moons, dark spots, and that the moon had an uneven surface. Ruined Church's theory of planets made of perfect substance

Commercial Revolution (causes and impact)

Causes- growth of towns, more trade
Impacts- guilds, more trading with foreign land, end to manorialism

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