Half of the Milky Way comes from other galaxies
Simulations suggest that galactic winds blew the material in from elsewhere
By
Ashley Yeager
9:00pm, July 26, 2017
Galaxies may grow by swiping gas from their neighbors.
New simulations suggest that nearly half the matter in the Milky Way may have been siphoned from the gas of other galaxies. That gas provides the raw material that galaxies use to build their bulk. The finding, scheduled to appear in the Monthly Notices of the Royal Astronomical Society, reveals a new, unexpected way for galaxies to acquire matter and could give clues to how they evolve.
https://www.sciencenews.org/article/half-milky-way-comes-other-galaxies?tgt=nr
