Should one expect the unobservable part to be e^50 to e^60 times larger? Ronald
On Tuesday, May 19, 2020 at 2:41:45 AM UTC-4, Philip Thrift wrote:E > > > > *Would traveling out in a "straight" line bring you back to where you > started?* > > > https://www.forbes.com/sites/startswithabang/2020/05/19/would-a-long-journey-through-the-universe-bring-us-back-to-our-starting-point/#1781c2ccf6c5 > > In the writer's (Ethan Siegel's) *opinion*: > > > On a cosmic scale, there is no indication that the Universe is anything > other than infinite and flat. There is no evidence that features in one > region of space also appear in any other well-separated region, nor is > there evidence of a repeating pattern in the Universe's large-scale > structure or the Big Bang's leftover glow. The only way we know of to turn > a freely moving object around is via gravitation slingshot, not from cosmic > curvature. > > And yet, it's a legitimate possibility that the Universe may, in fact, be > finite in extent, but larger than our observations can currently take us. > As the Universe unfolds over the coming billions of years, more and more of > it (about 135% more, by volume) will become visible to us. If there's any > hint that a long-distance journey would bring us back to our starting > point, that's the only place we'll ever find it. Our only hope for > discovering a finite but traversible Universe lies, quite ironically, in > our far distant future. > > @philipthrift > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/cc72aa75-4b91-4377-98a2-b704db3e5b73%40googlegroups.com.
