Is there a photo of the universe?
© NASA, ESA, S. Beckwith (STScI) and the HUDF team
The region of space observed by the Hubble in the HUDF is very small – about as much of the sky as would be visible through a two and a half meter long drinking straw. But the HUDF is by far the most detailed astronomical image ever created. It shows the most distant structures and gives the deepest view of the visible universe that has so far been obtained. The HUDF gives an idea of the size of the universe. It zooms in on an apparently uninteresting area of the sky and, where other telescopes would have shown us at most a couple of stars, it shows almost 10,000 galaxies. Astronomers have found among them the darkest and most distant galaxies so far discovered – light from these objects takes over 13 billion years to reach Earth (and hence the lens of the Hubble).
Credit: German Aerospace Center