(30-13.1) / 13.1 = 1.29 light-years / year. -- rec --
On Thu, Oct 24, 2013 at 3:25 PM, <lrudo...@meganet.net> wrote: > > From the BBC at http://www.bbc.co.uk/news/science-environment-24637890 > > (today) > > > > /Because it takes light so long to travel from the outer edge of the > > Universe to us, the galaxy appears as it was 13.1 billion years ago (its > > distance from Earth of 30 billion light-years is because the Universe is > > expanding)./ > > I don't see much wrong with it (though I don't know if it's a true > statement). > "Galaxy X was 13.1 billion light-years from here-and-now, along a > light-like > geodesic, when it emitted the radiation we are presently detecting. The > present > location of Galaxy X (assuming the truth of present physical theories, > etc.) is, > partly because the Universe has been expanding, 30 billion light-years from > here-and-now, in the sense that (with the same disclaimer) radiation we are > presently emitting will be detectable at Galaxy X in 30 billion years." > Does > my attempt at paraphrase go beyond, or not as far as, the original? If > not, > what's wrong with the paraphrase? > > Lee Rudolph > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com
