| Summary/Abstract |
In February 2016, scientists from the Massachusetts Institute of Technology (MIT) and the California Institute of Technology, or Caltech, joined with the National Science Foundation (NSF) to share some remarkable news: two black holes 1.3 billion light-years away had collided, and the resulting gravitational waves had been “heard” by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). This was the first time such waves—ripples in the space-time continuum caused by the violent acceleration of massive objects—had ever been directly observed. Albert Einstein had predicted such waves a century ago, but it was long doubted that instrumentation sensitive enough to confirm their existence could ever be created. It took more than four decades of work by a vast team of scientists to make the impossible possible.
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