Monday, December 9, 2019
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Building Andromeda: Galaxy ended up with stars orbiting at right angles

Odd angles — Our nearest big neighbor has a complicated history that's hard to explain. John Timmer - Oct 6, 2019 1:00 pm UTC The large galaxies present in the current Universe weren't always so big. Evidence indicates that they were built up over time, largely by collisions with other galaxies. These collisions have left…