Answer:
Long and think, red within, with a nail at the end.
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.
It is a path of cow juice spread across the sky but cannot be seen by the naked eye
What turns everything around but does not move?
What is always coming but never arrives?