The flight is set for liftoff at a precise moment: 1:04 a.m. local time at the Spaceport in French Guiana.

LISA Pathfinder was developed in a European Space Agency program and built by prime contractor Airbus Defence and Space. Produced to study the ripples in space-time predicted by Albert Einstein’s General Theory of Relativity, this scientific space probe will operate from the first Sun-Earth Lagrange point (L1).