13 Jan 2020, 16:00 UTC
Data: ESA/Gaia/DPAC, A. Khalatyan(AIP) & StarHorse team; Galaxy map: NASA/JPL-Caltech/R. Hurt (SSC/Caltech) Read more: https://www.newscientist.com/article/2210407-the-milky-way-devoured-another-galaxy-and-weve-spotted-the-remains/#ixzz5uRDTVf93
We now know when our galaxy had its last meal. The Milky Way devoured another galaxy, called Gaia-Enceladus, in what may have been the biggest galactic merger in its history, and now astronomers have used a single star to get a better idea of when it happened.