https://hackerpaper.kaipfister.de/p/1602.04188/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=19603893urn:hackerpapers:mention:1602.04188:19603893Mon, 08 Apr 2019 10:36:19 GMT<p>Yes we still don&#x27;t know exactly the speed of gravity and as it stands we know it to be the around the same speed of light with a margin of 70% ( https://arxiv.org/abs/1602.04188 ). But with so many theories at play, we still don&#x27;t know for sure. Indeed, some still believe that the speed of light has changed over time - hence https://en.wikipedia.org/wiki/Variable_speed_of_light . Which as a theory, if true, would really mess up distant astronomy calculations for some. As you say, would be nice to have some definitive experiment that reduced the margin for error and give a more definitive…</p><p><a href="https://hackerpaper.kaipfister.de/p/1602.04188/">Paper and discussion history</a>. A mention is not an endorsement.</p>gr-qc