NATS 1740 Lecture Notes - Lecture 9: Copernican Revolution, Scientific Theory, Falsifiability

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+ galileo stated objects in air would stay still as the earth is moving. => aristotle thought all objects would come to rest at the centre of the universe. + galileo stated objects would stay in motion unless a force acts to slow it down (newton"s first law of motion) + galileo saw sunspots on the sun, and valleys, mountains on the moon (though telescope) => prove that it is not a perfect heaven. + galileo showed stars are much farther than tycho thought. Galilean four moons => not all objects orbit earth. His observation of phases of venus proved its orbit sun not earth. Copernicus created the heliocentric model (sun is the centre of the universe). Galileo overcame the objections to the heliocentric model. Scientific theory: how can we distinguish science from non-science. Science = scientia (from latin), means knowledge . But not all knowledge come from science (other aspects such as right, wrong, good)

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