How have some stars had time to die since the universe began?
Question asked by: mrquestion
Asked on: 31 Mar 2008
This often confuses people that there are stars that have been through their entire life cycle yet there are many stars still forming.
Well part of the answer is that a large star burns quickers and dies quicker, so might have its whole life cycle in the fraction of the time a star like our own Sun does which is perhaps mid sized.
Therefore it might take a billion years for a large star to go through its lifecycle and if stars started to form around a billion years after the big bang, then after 2-3 billion years stars could have burnt out, thus they could have died already.
By: knowitall
Replied at: 31 Mar 2008
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