On Wed, 10 Dec 2003 12:10:53 -0500, Andrew Yee
wrote:

"HST is the only telescope on Earth or in space that can do this with the
required precision right now," Benedict said.

I'm curious - what prevents a ground-based telescope with adaptive
optics from being used for this? I remember reading that, for example,
the Keck telescopes can get diffraction-limited images with adaptive
optics, which should make their resolution four times as good as
Hubble's; or is it more complicated than that?

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