HOW HIGH IS UP?

This morning I shouldered my pack, picked up my .416 Taylor, and headed into the woods to shop for fresh meat.  As I walked along the clouds began to clear and I could see blue sky.  The sun was just above the treetops; its light fighting through the clouds trying to warm the earth.  I stopped in a clearing and watched the sun and incredible blueness of the sky.  I tried to remember why the sky is blue, but being a few months shy of 80, the memory was gone.

I stood contemplating the enormity of the universe for several minutes.  Then as I continued shopping the thought came to me, "What keeps astronomers from going nuts?"

Marshall Kimbrough-Warren