“A long time ago in a galaxy far far away” two black holes merged into one. To be more precise, this event happened approximately 1.3 billion years ago in a galaxy in the direction of the Magellanic clouds. We know this because scientists at the Laser Interferometer Gravity-Wave Observatories (LIGO) in Hanford, Washington and Livingston, Louisiana detected the gravitational waves of this massive collision on September 14, 2015. This was the first time gravitational waves had been detected despite the fact that Einstein had predicted their existence 100 years ago.
This is an important discovery that ushers in a whole new way of “seeing” our universe. Not only can we now detect light from distant parts of the universe but we can also detect gravitational waves. This also represents further understanding of what gravity is and how it acts over large distances and propagates at the speed of light. This measurement of gravitational waves immediately becomes a candidate for a Nobel prize.
I have always been fascinated by gravity. It is a force that is difficult to comprehend and describe. The best explanation of gravitational waves is that they represent ripples in the space-time continuum. Gravity is the way we describe the effect of acceleration as objects with mass create dents in space and time.