Skepticism is healthy most of the time.<p>In this case I don&#x27;t know if your skepticism is warranted.<p>1st: Paper said that the waves are redshifted to a certain degree (it&#x27;s in the abstract) [1], ergo 1.3 billion light-years away in space-time. I&#x27;m not thinking you want to be so fundamentally skeptical.<p>2nd: It&#x27;s in Wikipedia now <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Binary_black_hole#Observation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Binary_black_hole#Observation</a> so it&#x27;s pretty much fact.<p>You may choose to believe 1st or 2nd piece of evidence.<p>---<p>[1] <a href="https:&#x2F;&#x2F;dcc.ligo.org&#x2F;public&#x2F;0122&#x2F;P150914&#x2F;014&#x2F;LIGO-P150914_Detection_of_GW150914.pdf" rel="nofollow">https:&#x2F;&#x2F;dcc.ligo.org&#x2F;public&#x2F;0122&#x2F;P150914&#x2F;014&#x2F;LIGO-P150914_De...</a>