SIMPLE SYSTEMS - ATOMIC-HYDROGEN AND THE COSMIC MICROWAVE BACKGROUND-RADIATION

One thing George Series taught me well was the fascination of the comp lexity underlying simple systems, for instance the hydrogen atom. Like atomic H, the early Universe is a simple system. As is true for atomi c H, there are also fascinating complexities folded into the simplicit y of the Universe. In particular, small anisotropies in the relic heat of the Big Bang provide important clues both about the formation of s tructure in the Universe and about high energy physics.