As Mark says above, the universe is a very big place, with billions of galaxies, containing billions of stars, with countless planets. This image was taken by the Hubble space telescope, with a very long exposure, of an empty looking piece of sky, smaller than the quarter moon. Thousands of galaxies in this area alone, and the whole sky is similar. Look in this months Sky at Night magazine, and view the latest picture of ultra deep space. All those smudges are galaxies, the red one`s being the furthest away.