A: Tead about their purpose more carefully and you will see what I mean, and #2: Stars = Stars and Planets. We just didn't know that yet and He wasn't telling us that secret at that time.
I did a word search, there is no mention for any purpose for the stars, and there is nothing in the bible that says we are the ONLY creatures made in his image. That is other than of this earth.
But I suppose you would interpret the following as that the stars were created as a counting learning aid.
Genesis 15
4 Then the word of the LORD came to him: "This man will not be your heir, but a son coming from your own body will be your heir." 5 He took him outside and said, "Look up at the heavens and count the stars-if indeed you can count them." Then he said to him, "So shall your offspring be." 6 Abram believed the LORD , and he credited it to him as righteousness.