Europe approves â¬1bn mission to look for gravitational waves
European Space Agency has approved â¬1.05-billion Laser Interferometer Space Antenna  (LISA) mission that will search for minute ripples in space-time called gravitational waves. Three satellites separated by 25 lakh km in a triangular pattern will bounce lasers between each other. Deflection in these light beams would help detect warps of space-time caused by black hole collisions or other events.