Markarian 231, a binary black hole found in the center of the nearest quasar host galaxy to Earth, is seen in a NASA illustration released August 27, 2015. REUTERS/NASA/HandoutDr. Kip Thorne of Caltech (R) listens during a news conference to discuss the detection of gravitational waves, ripples in space and time hypothesized by physicist Albert Einstein a century ago, in Washington February 11, 2016. REUTERS/Gary CameronDr. Rainer Weiss, emeritus professor of physics at MIT, uses a visual aide during a news conference to discuss the detection of gravitational waves, ripples in space and time hypothesized by physicist Albert Einstein a century ago, in Washington February 11, 2016. REUTERS/Gary CameronLaser Interferometer Gravitational-wave Observatory (LIGO) research optic is shown in this undated photo released by Caltech/MIT/LIGO Laboratory on February 8, 2016. REUTERS/Caltech/MIT/LIGO Laboratory/Handout via ReutersLaser Interferometer Gravitational-wave Observatory (LIGO) technicians work on optics in this undated photo released by Caltech/MIT/LIGO Laboratory on February 8, 2016. REUTERS/Caltech/MIT/LIGO Laboratory/Handout via ReutersAn aerial photo shows Laser Interferometer Gravitational-wave Observatory (LIGO) Livingston Laboratory detector site near Livingston, Louisiana in this undated photo released by Caltech/MIT/LIGO Laboratory on February 8, 2016. REUTERS/Caltech/MIT/LIGO Laboratory/Handout via ReutersA Laser Interferometer Gravitational-wave Observatory (LIGO) technician performs a Large optic inspection in this undated photo released by Caltech/MIT/LIGO Laboratory on February 8, 2016. REUTERS/Caltech/MIT/LIGO Laboratory/Handout via ReutersRoni Gross, curator of the Hebrew University’s Albert Einstein Archive, displays original documents related to Albert Einstein’s hypothesis of the existence of gravitational waves during a news conference in Jerusalem February 11, 2016. REUTERS/Ronen ZvulunRoni Gross, curator of the Hebrew University’s Albert Einstein Archive, displays original documents related to Albert Einstein’s hypothesis of the existence of gravitational waves during a news conference in Jerusalem February 11, 2016. REUTERS/Ronen Zvulun(L-R) Doctors Gabriela Gonzalez, Rainer Weiss and Kip Thorne applaud the announcement of the detection of gravitational waves, ripples in space and time hypothesized by physicist Albert Einstein a century ago, in Washington February 11, 2016. REUTERS/Gary Cameron
