The Firmament

That Nature hung in Heav'n, and filled their lamps
With everlasting oil, to give due light To the misled and lonely traveller. Milton

The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger,who can no longer pause to wonder and stand rapt in awe, is as good as dead:His eyes are closed.
Albert Einstein

The word firmamentum means in classical Latin a strengthening or support. The firmament was the eighth sphere carrying the fixed stars, which surrounded the seven spheres of the planets in the geocentric model.