Ancient star clusters are the fossils of the astronomical world. (keckobservatory.org)
Using observations of ancient stars with W. M. Keck Observatory's 10 - meter telescope and state - of - the - art models of their atmospheres has shown that there is no conflict between their lithium - 6 and lithium - 7 content and predictions of the standard theory of Big Bang nucleosynthesis, restoring thus the order in our theory of the early universe. (keckobservatory.org)
Both would have been born from massive stars that evolved in close proximity in ancient star factories as a binary pair, eventually dying as supernovas. (science.howstuffworks.com)