Week 6: Copernicus and Kepler (Early February)
Show: Spaceship Earth --> Season: 1 - Season 1 (Winter)
AirDate: 5/18/1997
Runtime: 5
Voting: 0 (0)

Overview: Hidden planets. Kepler discovers the planets' timetable. The Earth moves more quickly in Winter. Earth overtakes Mars. Why we have two tides every day.