The advent of the second data release of the Gaia mission, in combination with data from
large spectroscopic surveys, is revolutionizing our understanding of the Galaxy. Thanks to …

Our Galaxy, the Milky Way, is a benchmark for understanding disk galaxies. It is the only
galaxy whose formation history can be studied using the full distribution of stars from faint …

We assemble a catalogue of candidate Sagittarius stream members with 5D and 6D phase-
space information, using astrometric data from Gaia DR2, distances estimated from RR …

Abstract The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE)
survey has obtained high-resolution spectra for thousands of red giant stars distributed …

This overview paper describes the legacy prospect and discovery potential of the Dark
Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the …

Galactic haloes in a Λ-CDM universe are predicted to host today a swarm of debris resulting
from cannibalized dwarf galaxies. The chemodynamical information recorded in their stellar …

We use the age–metallicity distribution of 96 Galactic globular clusters (GCs) to infer the
formation and assembly history of the Milky Way (MW), culminating in the reconstruction of …

We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and
Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We also report …

Globular clusters (GCs) formed when the Milky Way experienced a phase of rapid assembly.
We use the wealth of information contained in the Galactic GC population to quantify the …

The Λ CDM cosmology passes demanding tests that establish it as a good approximation to
reality. The theory is incomplete, of course, and open issues are being examined in active …