Yeah my first thought was that space isn't quite a vacuum, which maybe adds up over 130M light years to something measurable. Meanwhile, the gravitational wave

Yeah my first thought was that space isn't quite a vacuum, which maybe adds up over 130M light years to something measurable. Meanwhile, the gravitational wave is a fluctuation in space itself, so always moves at SoL? The sibling comment about one simply happening after another also seems very plausible though.