Scientists detect gravitational waves from colliding black holes again

On December 26, 2015, the LIGO detectors at Hanford in Washington and at Livingston in Louisiana detected a signal from the coalescence of two black holes, with masses 14 and eight times the mass of Sun. (Source: AP file photo)
A hundred years after Albert Einstein’s prediction, gravitational waves from a binary black hole merger were detected by two US-based Laser Interferometer Gravitational-wave Observatory (LIGO) detectors in September last year. But that was no fluke, as scienti