Merger with Gaia Enceladus has allowed scientists to find the original stars from our galaxy's formation.
, the team said the inner halo of the Milky Way is"dominated by debris" from another galaxy. This galaxy was found to be about a quarter of the size of the Milky Way.Nature Astronomy
Their findings showed that most of the stars in the inner halo are up to 10 billion years old—suggesting this is the point when the merger took place. By being able to put a constraint on the timing of the merger, the team was also able to identify the Milky Way's original stars. This is not the only time the Milky Way has merged with other galaxies. It is thought that throughout its history it has consumed many other, smaller galaxies.
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