Multiple Choice
Brightness variations of Jupiter's moons as they orbit the planet indicate that the relation between the spin around their axes and their orbital motions is that these moons
A) do not rotate at all while orbiting the planet.
B) rotate exactly once per orbital period.
C) rotate in a way that is controlled by the gravitational influence of the Sun, keeping one face toward the Sun to produce the observed brightness variations.
D) rotate on their axes independently of their orbital motion.
Correct Answer:
Verified
Correct Answer:
Verified
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