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'Andromeda's a train wreck,' says Hubble Space Telescope

IFLScience
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73% Informative

Hubble Space Telescope completes 10-year campaign of observations of Andromeda , the closest large galaxy to the Milky Way.

Hubble was able to resolve about 200 million stars, all hotter than our Sun .

The galaxy is so large that 600 separate fields of view had to be assembled in an extraordinary mosaic with 2.5 billion pixels.

Hubble spotted the hallmarks of a past collision with another galaxy.