Answer:
What is long and slim, works in light. Has but one eye, and an awful bite?
Forward Iām heavy, but backwards Iām not.
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
Add a T and I shoot through the sky. Then add an S and I multiply. What word is it?
The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.