LISA Pathfinder set to launch, paving way for discovery of gravity's secrets

Until now, most of the knowledge we have about the universe comes from seeing light or its equivalent, such as radio waves or ultraviolet radiation. To “listen” to the universe will mean detecting minuscule ripples in space. Called gravitational waves, they were predicted by Albert Einstein to be given out when celestial objects change their speed or direction of travel. They will allow unpreceden