“Unexplained” –Enormous ‘Phantom’ Galaxy Discovered Hidden at Outskirts of the Milky Way: ‘Is It One of Many?’

 

 

What remains unexplained is the object’s giant size, says astronomer Sergey Koposov at Carnegie Mellon University. “Normally, as galaxies lose mass to the Milky Way’s tides, they shrink, not grow.”

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