Milky Way sidelined in galactic tug-of-war, computer simulation shows

The Magellanic Stream is an arc of hydrogen gas spanning more than 100 degrees of the sky behind the Milky Way's neighbor galaxies, the Large and Small Magellanic Clouds. Our home galaxy has long been thought to be the dominant gravitational force in forming the Stream. A new computer simulation now shows that the Magellanic Stream resulted from a past close encounter between these dwarf galaxies rather than effects of the Milky Way.

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