A satellite that will test technology to detect ripples in space-time left by colliding black holes has been launched successfully.
The European Space Agency's LISA Pathfinder blasted off at 4:04 a.m. GMT Thursday (11:04 p.m. ET Wednesday). It's designed to make test measurements for a technique that will be used to detect gravitational waves - something in which scientists are greatly interested.
What's all the excitement about? Here's what you need to know...
Gravitational waves: How LISA Pathfinder will help detect ripples in space-time - Technology & Science - CBC News