As you play the moon orbit video, notice how the arrows representing the sun's rays are at first spread apart but become parallel as the video zooms in on the moon's orbit. why do the sun's rays become parallel at the end of the video? as you play the moon orbit video, notice how the arrows representing the sun's rays are at first spread apart but become parallel as the video zooms in on the moon's orbit. why do the sun's rays become parallel at the end of the video?