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Small galaxy consumes an even smaller galaxy

22 Oct 2021, 12:00 UTC
Small galaxy consumes an even smaller galaxy
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At left is NGC 2005, a globular star cluster. At right is the dwarf galaxy near our Milky Way that carries the name Large Magellanic Cloud. Scientists believe NGC 2005 was once part of a small galaxy, which the Large Magellanic Cloud consumed. Image via HLA/ Fabian RR/ ESO/ VMC Survey/ Astronomie.nl/ Phys.org.
Small galaxy eats smaller galaxy
Scientists believe they have evidence that the Large Magellanic Cloud, a dwarf satellite galaxy of our larger Milky Way galaxy, ate an even smaller galaxy in the distant past. A team of Italian-Dutch researchers examined globular clusters – ancient spherical groupings of stars found in halos around galaxies – of the Large Magellanic Cloud. It found one of those globular clusters – NGC 2005 – had a different chemical composition than the others. They believe this cluster is the remains of a smaller galaxy that the Large Magellanic Cloud absorbed.
The scientists published their paper October 18, 2021, in the peer-reviewed journal Nature Astronomy.
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Astronomers believe that galaxies grow through small building blocks until they become the large island universes we see. They have past evidence that the Milky Way grew in just such a way. ...

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