Hi Hoof Hearted,
Im no expert either but,
Some time ago I posted a question asking how it could be that the observable universe is 156 Billion light years across, when the Universe itself is only 14.5 Billion years old and nothing can travel faster the light.
I see a problem with this only in that the circumference of the universe has nothing to do with the amount of 'time' the universe has been expanding.
It
is 156 bilion light years across(I'll assume that number is right), and it is
also 13.7 billion years old.
But how is it possible that we can see objects which are so far away?
If you mean
see as in 'look up', sorry to say but you don't see very far.
You follow by asking,
How did light from stars at the edge of the observable universe travel here in order that we could see them?
Yes, but they don't
see that far, they use high powered telescopes to
see far distances.
Surely it must be the case that if an object is 75 billion light years away, it must take 75 billion years for their light to reach us?
Yes it is.
I hope that got the thread started, and I hope I was right on most of it.
Oni
"I smoke pot. If this bothers anyone, I suggest you look around at the world in which we live and shut your mouth."--Bill Hicks
"I never knew there was another option other than to question everything"--Noam Chomsky
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