What does Kepler's third law imply about planetary motion?
A) All planets orbit the Sun at the same speed.
B) Planets closer to the Sun orbit at a slower speed than planets further from the Sun.
C) Planets further from the Sun orbit at a slower speed than planets closer to the Sun.
D) Planets further from the Sun orbit at a faster speed than planets closer to the Sun.
E) This law implies nothing about a planet's motion.
Question 2
Cassini is the name of:
A) the French astronomer who first discovered a gap in Saturn's rings.
B) a gap in the rings created by a resonance with Mimas.
C) NASA's orbiter now taking photos of Saturn.
D) All of the above.
E) None of the above.
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