Yottawatt YOT-ah-wat n.:
1 million billion billion watts
That’s a lotta watts. And a lot more — 3.6 x 1049 watts, or 36 septillion yottawatts — blasted out of the black hole collision that the Advanced Laser Interferometer Gravitational-Wave Observatory detected in September. Rather than a flash of light, the power came out as ripples in spacetime. As the black holes merged, three suns’ worth of mass transformed into gravitational wave energy in a few milliseconds, researchers report in Physical Review Letters on February 12.