From: Sam Wormley on
Astronomers' Wish List: Giant Scopes, Satellites, and Lots of Moola
Every 10 years, the U.S. astronomy community goes through the collective
exercise of ranking its dream projects, hoping that a few of them will
see the light of day...

http://news.sciencemag.org/scienceinsider/2010/08/astronomers-wish-list-giant-scopes.html?etoc