This question has options. Select from options: Read this fact: "the Earth revolving around the sun causes stars to appear in different areas in the sky at different times of year"

Now answer this question: "The earth makes its way around the sun. Because of the constant rotation, the appearance of these is unlikely to be regular."

Options are:
+ the moon.
+ the oceans.
+ celestial bodies.
+ the sun.
celestial bodies