Author Question: According to Kepler's laws, Halley's Comet circles the Sun in an elliptical path with the Sun at one ... (Read 62 times)

serike · **on:** Jul 28, 2018

According to Kepler's laws, Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse. What is it that Kepler's laws indicate is at the other focus of the ellipse?
a. nothing
b. the Earth
c. The comet itself passes through the other focus.
d. The tail of the comet stays at the other focus.

Question 2

Of the known planets in our solar system, the innermost is Mercury. When compared to the other planets in the system, Mercury has:
a. the greatest centripetal acceleration.
c. the smallest speed. b. the greatest period of revolution.
d. none of the above properties.