Answer:
I help engines spin and pants stay up
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
I am a rock group that has 4 members, all of whom are dead, one of which was assassinated. What am I?
I am the book one can never finish reading
The more of me there is the less you see.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.