Galactic Archaeology

08/10/2018
The star Pristine 221.8781+9.7844 is one of the oldest stars in the Milky Way. We know this because of its atmosphere. Just after the Big Bang the universe was full of hydrogen and helium with very little lithium there were no heavier elements because these are synthesized in the interiors of stars. David Aguado´s view, Severo Ochoa PhD student during the period 2012-2015, is that "As the atmosphere of the star we have analyzed is very poor in metals, we can say with confidence that this is one of the oldest objects in the Milky Way, and of course it is much older than the Sun" and he adds that "This star will help us to better understand certain features of the origin of the Milky Way and how the first stars formed". >> Read more