The variation in the length of the Solar Day over the course of a year is due to a. the increase in the orbital period of the Moon about the Earth * b. the changing speed of the Earth in its orbit about the Sun c. the orbit of the Sun about the center-of-mass of the Solar System d. changes in the rotation rate of the Earth on its axis e. the slow rotation of the Sun on its axis 20.
(The variation in the length of the Solar Day over the course of a year; is; due to a. the increase in the orbital period of the Moon about the Earth)
The variation in the length of the Solar Day over the course of a year
is
due to a. the increase in the orbital period of the Moon about the Earth