The moon rises and sets every day, like the sun. sarah noticed that the moon was sometimes visible at night and sometimes during the day. she noted when she first saw the moon (moon-rise) on two days in april. she looked up the time in the newspaper for moon-set. both were different. why? a) the moon is orbiting the earth once per month. b) the night sky is moving east to west over earth. c) the earth is moving in an opposite direction from the moon. d) the apparent change in position is related to the sun's reflection.