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Old 31st December 2018, 08:25 AM   #45
Roboramma
Penultimate Amazing
 
Join Date: Feb 2005
Location: Shanghai
Posts: 16,041
One of my favourites is that if you look at a spot 13 billion light years away in that direction:
<--------------------

And look at another spot 13 billion light years away in that direction:
--------------------->

You will be looking at two points that are (well, were) much closer to each other than they are to you.

point 1 <----------13 billion light years------------- you -------------13 billion light years------------> point 2

Weird right?
In fact, I think those two points are actually only tens of millions of light years apart, but don't quote me on that.
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"... when people thought the Earth was flat, they were wrong. When people thought the Earth was spherical they were wrong. But if you think that thinking the Earth is spherical is just as wrong as thinking the Earth is flat, then your view is wronger than both of them put together."
Isaac Asimov
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