 In what was likely his last EVA, Grunsfeld's has accumulated fifty-eight hours and thirty minutes spacewalking, just two minutes less than Jerry L. Ross, who is third on the list of spacewalking time.The completion of all the major objectives, as well as some that were not considered vital, upgraded the telescope to its most technologically advanced state since its launch nineteen years ago, and made it more powerful than ever.The upgrades will also help Hubble to see deeper into the universe, and farther into the past, closer to the time of the Big Bang.