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Science → Physical sciences → Space and astronomy
ANSWERS: 1
  • Official Know-It-All
    The fact that the planets orbit the sun in elliptical rather than circular orbits was initially discovered by Johannes Kepler, using astronomical data collected by Tycho Brahe. He formulated three physical laws from this data about the nature of the planetary orbits.

    Source:

    Astro-Tom: Elliptical Orbits

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