Recently, a team of astronomers led by Hao Tian of the Chinese Academy of Sciences (CAS) have explored stellar substructures in the Milky Way's halo using astrometry from Gaia's Data Release 3 (DR3).

https://doi.org/10.1086/316270 • https://www.jstor.org/stable/10.1086/316270 ABSTRACT We describe methods for extracting quantitative spectra and astrometric ...