Lund researchers find traces of galaxies devoured by the Milky Way


Our galaxy, the Milky Way, is strongly suspected of devouring a group of “ghost stars” just over ten billion years ago. The stars most likely come from a hitherto unknown so-called baby galaxy, astronomers in Lund report.

They made their surprising discovery during a study of the origin of the Milky Way, which is published in the scientific journal Astrophysical Journal.

“We have found traces of a smaller galaxy devoured by the Milky Way. This intergalactic relic was indirectly revealed by a population of ten billion year old stars in the Milky Way’s disk. It is the first time such old stars have been shown to show signs of coming from another galaxy “, says astronomy researcher Diane Feuillet, who led the study, in a press release from Lund University.

The Milky Way consists of three major parts: a counter (where our sun is), a halo and a central part. It has previously been known that stars from other galaxies have been drawn into halons, about as long ago.

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