Milky Way Swallowed Up Undiscovered Galaxy Over Eight Billion Years Ago, Reveals ESA Gaia Spacecraft

Feb 19, 2022 | EARNINGS

Over the last 13.6 billion years, our Milky Way galaxy has collided with, and consumed, other galaxies. However, astronomers’ knowledge of the process has remained incomplete, particularly with regard to the total number of mergers and their dynamical properties.

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