'We may be able to watch dark energy turn on': Unprecedented sky survey
Tuesday, September 3, 2013 - 15:20
in Astronomy & Space
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."