Questions about the German astronomer famous for his three laws of planetary motion. Do not use this tag for questions about the Kepler spacecraft.
For questions about the Kepler spacecraft, use the kepler tag.
Questions tagged [johannes-kepler]
17 questions
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Are epicycles and mean Earth/Sun actually useful astrophysical concepts?
Copernicus put the Sun in the center of the Solar system. This turns the Moon's orbit into an epicycle around Earth orbit. And the Jovian moons (later discovered) have orbits which are epicycles around Jupiter. Since Copernicus created a physical…
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