Fluctuations in space-time, also known as "gravitational waves," are gravitational perturbations that propagate at the speed of light and can penetrate "through" matter, like an x-ray. The gravitational waves are thought to have imprinted the "primordial soup" of matter and photons that later coalesced to become gases, stars and galaxies--all the structures that we now see. The photons left over from the Big Bang will be captured by the telescopes to give scientists a unique view back to the universe's beginning.
MORE: http://www.sciencedaily.com/releases/2013/01/130108141955.htm
