'We may be able to watch dark energy turn on': Unprecedented sky survey

Moonless nights outside the Cerro Tololo astronomical observatory in Chile are so dark that when you look down, you can't see your feet. "You can't see your hands," said a physicist. "But you can hold them up to the sky and see a hand-shaped hole with no stars in it. It's really incredible."

Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/T...