Week 6: Copernicus and Kepler (Early February) - S1.E6 - Spaceship Earth
Hidden planets. Kepler discovers the planets' timetable. The Earth moves more quickly in Winter. Earth overtakes Mars. Why we have two tides every day.
Week 6: Copernicus and Kepler (Early February) - S1.E6 - Spaceship Earth
May 18, 1997
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