Gaia-Sausage-Enceladus: a major galaxy merger with the Milky Way about 8-11 billion years ago. Credit: Merger History of the Milky Way Jul 21, 2020 Gaia-Sausage-Enceladus: a major galaxy merger with the Milky Way about 8-11 billion years ago. Credit: Merger History of the Milky Way Jul 21, 2020 Milky Way Galaxy Merger Galaxy Formation Accreted Stellar Structure Machine Learning Gaia Tri V Nguyen Ph.D. Candidate Tri is a Ph.D. Candidate at MIT Kavli Institute for Astrophysics and Space Research. He develops machine learning techniques to understand how structure forms and evolves in the Universe.