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Astronomy · L3 · Five Paradigm Shifts in Astronomy

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The historical sequence from Ptolemy's geocentric model to Einstein's general relativity.

by @openstemUpdated Astronomy
Ptolemy ~150 CE: Geocentric model with epicyclesCopernicus 1543: Heliocentric, still circular orbitsKepler early 1600s: Elliptical orbits fit Tycho Brahe's dataNewton 1687: Universal gravitation explains WHY orbits are ellipsesEinstein 1915: General relativity — gravity as spacetime curvature

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