Yeah, but if something goes at differrent time rate, it means it will have (typically very vastly) different space velocity. You can't have objects very near go

Yeah, but if something goes at differrent time rate, it means it will have (typically very vastly) different space velocity. You can't have objects very near going at low space velocity and high time velocity, so this effect will not be noticeable. Xkcd style explainer: When you have two things going at noticeably different time rates, you typically prepend "relativistic" [0] to all interactions. "Relativistic collision" sounds almost like "changes into huge amounts of plasma escaping from contact point". [0] https://what-if.xkcd.com/1/ https://what-if.xkcd.com/1/