Andromeda galaxy appears enlarged by swallowing stars from other galaxies, such research results.

When a team of scientists mapped Andromeda, they found the stars they say are “the remnants of dwarf galaxies”. The astronomers reported their findings in the journal Nature.

Eating the stars had been predicted previously, but this survey team provides detailed pictures to show it happened. Figure it shows “hierarchical model” the formation of galaxies is running.

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