> 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
