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The Milky Way may be slowly devouring a hidden neighbouring galaxy

https://www.newscientist.com/article/2192424-the-milky-way-may-be-slowly-devouring-a-hidden-neighbouring-galaxy/

The Magellanic Clouds orbit the Milky Way

The Magellanic Clouds orbit the Milky Way

ESO

There’s something strange in the neighbourhood, and it may be a sign of a nearby galaxy that we didn’t know existed.

The mystery starts with two dwarf galaxies called the Magellanic Clouds that orbit the Milky Way, and a stream of gas in front of them that is tough to explain. Past attempts at puzzling out the origin of this object, known as the Leading Arm, point to gravitational interactions between the Magellanic Clouds. But Marcel Pawlowski at the Leibniz Institute for Astrophysics Potsdam in Germany …

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