Quote:
Originally Posted by Mac Howard
Now what I can't understand about this idea that the universe is 93 billion light years across (the extreme 46.5 billion light years from the centre and big bang point) is this:
If the universe is 14 billion years old and nothing can travel faster than light then how can anything be greater than 14 billion light years away from the point of the big bang - 28 billion light years across? Was/is the universe expanding faster than the speed of light?
There's obviously something wrong with my thinking but I don't know what it is. Anyone enlighten me?
As for your second link, cartman, I couldn't get beyond
And that's only the second line  |
Because the speed of light is not constant. It varies. That is why it is defined as the speed of light in a vacuum. Some scientists believe that the speed of light may have been faster in the early universe and allowed things to expand more quickly.