Thanks for all the corrections. Nobody knows all, we all continue to learn till we're deceased. I've actually learnt a lot more from you tonight.

Truly, the gravitational waves was detected in 2015.

The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016.^source

I'll effect all the changes amongst others. Thanks once again, @lemouth.