“Atomyriades”

http://commons.wikimedia.org/wiki/File:Galaxy_history_revealed_by_the_Hubble_Space_Telescope_(GOODS-ERS2).jpg

Nature, it seems, is the popular name
For milliards and milliards and milliards
Of particles playing their infinite game
Of billiards and billiards and billiards.

— Piet Hein