Answer:
It is a path of cow juice spread across the sky but cannot be seen by the naked eye
What word has kst in the middle, in the beginning, and at the end?
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
What breaks on the water but never on the land?
What can be forever wound up but never annoyed?
I am rarely touched but often held. If you are smart you'll use me well. What am I?