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Horizon

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dr.bob
951741.  Mon Nov 19, 2012 5:08 am Reply with quote

suze wrote:
I start asking questions like "But if the Universe is getting bigger all the time, what is outside it that is being pushed out the way". Apparently you're not allowed to ask that.


This is science, not religion: you're allowed to ask anything.

The only downside is that some questions have answers that are really quite complicated to explain to someone without a deep understanding of maths, physics, topology, and the concept of "infinity". Some questions also have the answer of "we don't know" (though this being science, I prefer to phrase that answer as "we don't know yet").

Anyway, for a much better attempt at an explanation for what the universe is expanding into, I recommend you cast an eye over this webpage:
http://curious.astro.cornell.edu/question.php?number=274

 
PDR
951754.  Mon Nov 19, 2012 7:28 am Reply with quote

And indeed this one

PDR

 
'yorz
951756.  Mon Nov 19, 2012 7:32 am Reply with quote

You were one step ahead of me, PDR :-)

 
PDR
951758.  Mon Nov 19, 2012 7:41 am Reply with quote

Spooky!

PDR

 

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