According to Kepler's __________, a planet in an elliptical orbit will move most rapidly when it is closer the sun.
A. first law (orbits of the planets are ellipses with the sun at one focus).
B. second law (a line from a planet to the sun sweeps over equal areas in equal intervals in time).
C. third law (a planet's orbital period squared is proportional to its average distance from the sun cubed).
D. (Kepler's laws do not vary the speed of a planet along its orbit.)
Answer:B
According to Kepler's __________, a planet in an elliptical orbit will move most rapidly when it is closer the sun.
A. first law (orbits of the planets are ellipses with the sun at one focus). B. second law (a line from a planet to the sun sweeps over equal areas in equal intervals in time). C. third law (a planet's orbital period squared is proportional to its average distance from the sun cubed). D. (Kepler's laws do not vary the speed of a planet along its orbit.)