If you go out at exactly 9 P.M.each evening over the course of one month, the position of a given star will move westward by tens of degrees.What causes this motion?
A) Earth's rotation on its axis
B) the revolution of Earth around the Sun
C) the revolution of the Moon around Earth
D) the revolution of the Sun around Earth
E) the speed of the star through space

Question

Quizplus · Accepted Answer

The westward motion of stars observed at the same time each night is due to Earth's revolution around the Sun. As Earth orbits the Sun, the night sky shifts slightly each day, causing stars to appear to move westward over the course of a month.

If You Go Out at Exactly 9 P