Séquence de Hubble

been shining and that something had switched them on. It was Edgar Allan Poe, in his prophetic prose poemEureka (1848), who first suggested that the light from the most distant stars is still on its way. In 2003 the Ultra Deep Field Camera of the Hubble Space Telescope was pointed at what appeared to be the emptiest piece of the night sky and the film exposed for a million seconds (about eleven days). The resulting picture showed tens of thousands of hitherto unknown galaxies, each consisting of