Dwarf galaxies in the vicinity of the Milky Way are believed to be its satellites, much like the Earth orbiting the Sun. The new Gaia data released at the end of 2020 reveals that they are new comers in the Galaxy surroundings, which is the conclusion of the international team from France, China, and Germany. Published online on November 24, 2021 in the Astrophysical Journal, the study calls into question many ideas about our Galaxy and its environment.

Based on LAMOST and Kepler data, a new study, led by astronomers from NAOC, has revealed evolutionary features of lithium for evolved stars, which updates our understanding about the theory of stellar structure and evolution. The results have been published in The Astrophysical Journal Letters.

Using LAMOST's medium-resolution spectral data, Chinese astronomers discovered 3,133 spectroscopic binary and 132 spectroscopic triple candidates, and their radial velocities were accurately measured. Among them, 95% were newly discovered multi-star systems.