Hi,
A faint star in the constellation of Leo (The Lion), called SDSS
J102915+172927 [1], has been found to have the lowest amount of elements
heavier than helium (what astronomers call "metals") of all stars yet
studied. It has a mass smaller than that of the Sun and is probably more
than 13 billion years old.
"A widely accepted theory predicts that stars like this, with low mass
and extremely low quantities of metals, shouldn't exist because the
clouds of material from which they formed could never have condensed,"
[2] said Elisabetta Caffau (Zentrum fur Astronomie der Universitat
Heidelberg, Germany and Observatoire de Paris, France), lead author of
the paper. "It was surprising to find, for the first time, a star in
this 'forbidden zone', and it means we may have to revisit some of the
star formation models."
Ref. http://www.sciencecodex.com/the_star_that_should_not_exist
Kind regards,
MoB
