Stars are not eternal; they die in unimaginably large explosions called supernovas. Second only to the Big Bang, these explosions are where creation and destruction meet. We have just begun to understand these wonders in our sky.

Is our solar system unique? Since the first discovery of a planet orbiting another star, some 280 alien solar systems have been identified. It's only by looking at solar systems far beyond our own, that we can understand how remarkable our universe is.