Quote:
Originally Posted by Eratosthenes
If alpha Centauri exploded today we would still be seeing it as a normal star in the night sky for another 4.3 years even though it has actually turned to dust and gas.
It's a little bit like estmating the actual size of the universe. If the Big Bang occurred 13.4 billion years ago, and there is a speed limit in the universe of "c" how can the size of the universe be over 90 billion light years across?
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I think a bit of reading will give you the answers you require.
Google your question.
