RE: You think you are special to all this? Ok......
February 23, 2016 at 9:41 pm
(This post was last modified: February 23, 2016 at 9:41 pm by Ravenshire.)
(February 23, 2016 at 6:47 am)Alex K Wrote: It does not appear very sensible to me to describe the observable universe as having 13.8 billion lightyears radius. The furthest things we now see are now what, 50 billion lightyears away? I don't understand where the 13.8 would even come into play as a distance, but I am happy to be told
Alex, you're absolutely right. I was going strictly by the age of the universe and the speed of light.
Seems I'm quite mistaken (from the above link):
The best estimate of the age of the universe as of 2015 is 13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28.5 gigaparsecs (93 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46.5 billion light-years away.
I love learning shit I didn't already know about our universe!
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