Hubble Approaches the Final Frontier: The Dawn of Galaxies, a PR earlier today, includes some interesting results, as well as a good insight into how five different teams analysed the data in different ways to arrive at more or less the same, or mutually re-inforcing, conclusions. From this PR: "Astronomers are now debating whether the hottest stars in these early galaxies may have provided enough radiation to "lift a curtain" of cold, primordial hydrogen that cooled after the big bang. This is a problem that has perplexed astronomers over the past decade, and NASA's Hubble Space Telescope has at last glimpsed what could be the "end of the opening act" of galaxy formation. These faint sources illustrate how astronomers can begin to explore when the first galaxies formed and what their properties might be. But even though Hubble has looked 95 percent of the way back to the beginning of time, astronomers agree that's not far enough. "For the first time, we at last have real data to address this final frontier — but we need more observations. We must push even deeper into the universe, unveiling what happened during the initial 5 percent of the remaining distance back to the big bang," said Richard Ellis of the California Institute of Technology in Pasadena, Calif."