B.B.C. Article
Gravity space mission passes big testThe mission to demonstrate technologies needed to detect gravitational waves in space has been a stunning success.
The Lisa Pathfinder satellite was sent into orbit to test elements of the laser measurement system that would be used on a future observatory.
Performance objectives were exceeded on the very first day the equipment was switched on.
"During commissioning, the requirements were being met already," co-principal investigator Karsten Danzmann said.
"We hadn't tweaked anything; we'd just turned everything on to see if the laser was running and, bang, there it was. And the performance has just got better and better ever since," he told BBC News.

There is currently enormous excitement around gravitational waves - the ripples in space-time generated in cataclysmic cosmic events, such as the merger of black holes and the explosion of giant stars.
The existence of these phenomena was first confirmed last year at the Advanced Ligo facilities in the US.
They picked up a very subtle disturbance in their laser interferometers as waves from far-distant, coalescing black holes passed through the Earth.
The success has been lauded as one of the great scientific breakthroughs in decades.
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