Bigger rockets = better space telescopes

''Ares V is the rocket that will deliver NASA's next manned lunar lander to the moon as well as all the cargo needed for a lunar base.
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"Imagine the kind of telescope a rocket like that could launch," says Thronson. "It could revolutionize astronomy."
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An 8-meter monolithic telescope would see things more than three times as sharply as Hubble can. More importantly, in the same amount of observing time, the larger mirror would see objects that are about 11 times fainter than Hubble sees because the 8-meter telescope has 11 times the light collecting area.'' [source]