Below is a deep HST survey field which was the result of combining 7200 seconds of HST observations. In the picture are many faint galaxies, in fact literally hundreds, which have never been seen before. A typical faint galaxy in this image is probably at a redshift greater than 0.5 which makes it further than 5 billion light years. The image is 748 x 768 pixels covering 74.8 x 76.8 arc seconds. More information on the deepest HST images yet taken can be found at the Princeton parallel HST survey web page , which features strips of deep HST images which being used to see the formation and evolution of galaxies in the early universe.
Astronomy is fortunate in producing some of the most compelling images of any science.
For a sample of the stunning imagery in astronomy, you can examine some of the images produced by the Jet Propulsion Laboratory , as a result of recent planetary missions. A large gallery of images from JPL is available in this page, which shows a range of planets, a black hole, a protogalaxy and moutains from our own planet as viewed by spacecraft. The recent cataclysmic collision of the comet Shoemaker-Levy has captured the imagination of scientist and citizen alike. A complete comendium of all the comet images from the recent collision with Jupiter may be found in the JPL library of images , which includes images from Chile, Hawaii, Arizona and other observatories.