Originally Posted by
Roboramma
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.
I thought the 2 points would be about 45 billion light years apart? IOW the size of the visible universe is ~45 billion light years across even though we can see ~13 billon light years in any given direction.