The
Renaissance view of Mars
•Orbit was measured, observed by Kepler,
Galileo.
•Some wondered about life on other
planets.
•Galileo “guessed” Mars has two moons.
•1659-66: Huygens, Cassini calculate Mars’s orbital period.
•Huygens speculates habitable planets.
•Still just a point of light.
History of
Mars Exploration
alive
dead
Mars Life Pendulum