TRUE OR FALSE     1. Ptolemy elaborated theories for each of the planets, as well as for the Sun and Moon.      2. Several of Tycho’s observations contradicted Aristotle’s system: a nova that appeared in 1572.      3. The line between a planet and the earth sweeps out equal areas in equal periods.      4. The planets travel around the Sun in elliptical orbits.      5. The square of a planet's period, T, is directly proportional to the cube of its average distance from the Earth.

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