Now, in a paper published in Physical Review Letters on February 11, the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo collaborations announce the detection of just such a black hole merger — knocking out two scientific firsts at once: the first direct detection of gravitational waves and the first observation of the merger of so-called binary black holes. The detection heralds a new era of astronomy — using gravitational waves to “listen in” on the universe.
In the early morning hours of September 14, 2015 — just a few days after the newly upgraded LIGO began taking data — a strong signal, consistent with merging black holes, appeared simultaneously in LIGO's two observatories, located in Hanford, Washington and Livingston, Louisiana.
Notice that this is the FIRST time I'm even mentioning this here, considering that for the past 2 weeks, at least, the rumors about this have been flying around all over the place.
Looks like if this is confirmed, we know in which area the next Nobel prize will be awarded to.
There is also a sigh of relief, because we have been searching for this darn thing for years, if not decades. It is another aspect of General Relativity that is finally detected.