For a planet moving around the Sun in an elliptical orbit of semimajor and semiminor axes a and b respectively and Time period T.
For this situation which one of the following statements is correct?

Options

A. The torque acting on the planet about the Sun in non-zero
B. The angular momentum of the planet about the Sun is constant
C. The planet moves with a constant speed around the Sun
D. The areal velocity is `piab//T`

Answer

B

Explanation

For a planet moving around the Sun, the angular momentum of the planet is conserved.