... Star Atlas . ... stars . ... milky way . ... U sing ESO's Very Large Telescope, an international team of astronomers has shown how to use the chemical composition of stars in clusters to shed light on the formation of our Milky Way. ... This paves the way to chemically tagging stars in our galaxy to common formation sites and thus, unraveling the history of the Milky Way," she adds. ... Once the "DNA" of each star cluster is inferred, it will be possible to trace the genealogic tree of the Milky Way...