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Interacting galaxies

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"What happens when galaxies collide?" (Ask an Astronomer)

Galaxies are made mostly of stars and gas. But when galaxies collide, the stars and the gas do very different things. In a typical spiral galaxy, for example, there might be about 100 billion stars....
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    #typical spiral galaxy #interacting galaxies #typical galaxy #he of the tail o doom #atronomy #watch what happens L!VE #Education

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