The history of the Milky Way can be read in the new maps of Gaia

This map shows the metallicities of stars in the Milky Way as measured by the Gaia mission. Red stars are the richest in metals. The blue stars, the poorest in metals. © Gaia Data Release 3: Chemical cartography of the Milky Way by Gaia Collaboration et al. 2022CC by-SA 3.0 IGO