09 Feb '14 19:30>3 edits
http://phys.org/news/2014-02-oldest-star-iron-fingerprint.html
it is 13.6 billion years old, so old that it contains no detectable trace of iron as proven by its spectrum of light that shows no trace of absorption lines for iron that other stars show.
That is because 13.6 billion years ago, there wasn't enough time for iron to form because the age of the universe is about 13.798 billion years and thus, at the time of the formation of that star, the universe was only about ~2 billion years old and it would have taken a lot longer for nuclear reactions to make iron which would have taken many millions of years.
Incidentally, this is further evidence (as if 'further' evidence is needed 😛 ) that the universe is many millions of years old else what possible explanation would be that this very old star has no iron but the other younger ones do if the reason is not that there wasn't enough time for iron to form when the first stars formed because this process of iron formation would have taken millions of years?
it is 13.6 billion years old, so old that it contains no detectable trace of iron as proven by its spectrum of light that shows no trace of absorption lines for iron that other stars show.
That is because 13.6 billion years ago, there wasn't enough time for iron to form because the age of the universe is about 13.798 billion years and thus, at the time of the formation of that star, the universe was only about ~2 billion years old and it would have taken a lot longer for nuclear reactions to make iron which would have taken many millions of years.
Incidentally, this is further evidence (as if 'further' evidence is needed 😛 ) that the universe is many millions of years old else what possible explanation would be that this very old star has no iron but the other younger ones do if the reason is not that there wasn't enough time for iron to form when the first stars formed because this process of iron formation would have taken millions of years?