Answer:
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What's at the head of an elephant and at the tail of a squirrel?
What is brown and is very stick?
It moves around in circles. We see it as we turn. It keeps us always warm. Always alive and always dying, Across the sky we see it flying, But touch it and we burn.
What divides by uniting and by dividing?
Iβm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.