<em><u>The stars and constellations move and change their location from month to month.</u></em>
<em><u>Explanation:</u></em>
Remember, the Earth undergoes a <u>continuous rotation around the sun</u>; Thus, with each day some stars which were ones visible in certain parts of the Earth may not be visible later on.
It is believed due to such circumstances NASA publishes a different Star Finder every month<u> to keep track of the stars and constellations as they move and change their location.</u>