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In Physics, he created a thermometer, and discovered the laws of falling bodies and the parabolic motion of projectiles.

In Astronomy, he perfected the telescope, with which he discovered sunspots, lunar mountains and valleys, the four largest satellites of Jupiter, and the phases of Venus. These discoveries supported the heliocentric nature of the solar system, and brought Galileo into conflict with the Roman Catholic Church. It convicted him of heresy and restricted his freedom for the last 8 years of his life.

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13y ago

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