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Tech Head - The Technology Section
Einstein's Alcove
Does space ever end?
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<blockquote data-quote="spiney" data-source="post: 246160" data-attributes="member: 192438"><p>The universe has no "outside", and spacetime itself is curved.</p><p><a href="http://en.wikipedia.org/wiki/Curved_space-time" target="_blank">http://en.wikipedia.org/wiki/Curved_space-time</a> .</p><p></p><p>Whether the universe is open or closed is, I believe, currently unknown.</p><p><a href="http://en.wikipedia.org/wiki/Closed_universe" target="_blank">http://en.wikipedia.org/wiki/Closed_universe</a> .</p><p></p><p>Note that we're talking about space-time, as revealed by special relativity, as space-by-itelf doesn't exist!</p><p></p><p>According to Hawking and Penrose, as you go back towards the start of the universe, space and time topologically merge, so time doesn't have any "beginning" .....</p><p><a href="http://www.fu-berlin.de/info/einstein_lectures/2005/vortrag.html" target="_blank">http://www.fu-berlin.de/info/einstein_lectures/2005/vortrag.html</a> .</p></blockquote><p></p>
[QUOTE="spiney, post: 246160, member: 192438"] The universe has no "outside", and spacetime itself is curved. [url]http://en.wikipedia.org/wiki/Curved_space-time[/url] . Whether the universe is open or closed is, I believe, currently unknown. [url]http://en.wikipedia.org/wiki/Closed_universe[/url] . Note that we're talking about space-time, as revealed by special relativity, as space-by-itelf doesn't exist! According to Hawking and Penrose, as you go back towards the start of the universe, space and time topologically merge, so time doesn't have any "beginning" ..... [url]http://www.fu-berlin.de/info/einstein_lectures/2005/vortrag.html[/url] . [/QUOTE]
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Einstein's Alcove
Does space ever end?
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