Astronomers at the Space Telescope Science Institute today unveiled the deepest portrait of the visible universe ever achieved by humankind. Called the Hubble Ultra Deep Field (HUDF), the million-second-long exposure reveals the first galaxies to emerge from the so-called dark ages, the time shortly after the big bang when the first stars reheated the cold, dark universe. Credit: NASA, ESA, S. Beckwith (STScI) and the HUDF Team
