Using Gaia survey data, scientists found the oldest stars in the Milky Way.
The astronomers were looking for the most metal-poor stars in the Milky Way. Gaia, LAMOST and APOGEE give a better understanding of the stars in ourand what they are made of by observing the light they emit and determining their chemical compositions.
in the Milky Way. Why red giants? Their brightness and metallicities stood out, and in the background were the stars the team was looking for: the" poor old heart" in the galactic center.
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