Ge 1:15 "and let them be for lights in the firmament of the heavens to give light on the earth"; and it was so.

16 Then God made two great lights: the greater light to rule the day, and the lesser light to rule the night. He made the stars also.

17 God set them in the firmament of the heavens to give light on the earth,

18 and to rule over the day and over the night, and to divide the light from the darkness. And God saw that it was good.

19 So the evening and the morning were the fourth day.

God made the sun, the moon and the stars and every other celestial bodies out there in outer space as servants of man.

They don't dictate or exert an influence as to what happens to a man's life so that if we study their positions we can somehow make a prediction of what will happen to our lives. No, they are servants.

First, they are placed there to help us establish a calendar.
Second, they are there to give us light.

Moses in these verses had to emphasize the functions of these celestial bodies to correct the common misconception back then that these celestial bodies are deities to be worshiped. Moses says: "No, they are our servants."

Are there other life forms residing in these celestial bodies? Based on the purpose stated here in these verses as to why these celestial bodies were made, we can definitely say that there are no life forms there. They were not created to support life of some other life forms out there.