The 2017 Nobel Prize For Physics Goes To Three Scientists Who Proved Einstein Right (fastcompany.com)
An anonymous reader shares a report: The three physicists, Rainer Weiss, Kip Thorne, and Barry Barish, won the coveted prize for the detection of gravitational waves -- the ripples in the fabric of spacetime that were first predicted by Albert Einstein a century ago. Weiss, Thorne, and Barish made the discovery as part of the LIGO/VIRGO Collaboration back in February 2016. It was then that they had recorded gravitational waves coming from the collision of two massive black holes a billion light-years away.
I realize you're trying to be funny, but what your describing is still possible.
The summary is only saying that the two black holes existed a billion years ago. It's not saying earth existed a billion years ago.