Possible perp found in mystery of Milky Way’s missing galaxy pals | Science News

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Possible perp found in mystery of Milky Way’s missing galaxy pals

Supernova turmoil could have blasted away galactic building materials

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7:00am, June 26, 2016
satellite galaxies

VIRTUAL GALAXY  New simulations show that supernovas whittle away at the sea of dark matter surrounding our galaxy (left), leaving only a few blobs that are massive enough (circled) to create satellite galaxies. The image on the right, from the same simulation, shows where stars end up forming. 

SAN DIEGO — The long-standing mystery of the Milky Way’s missing satellite galaxies has a credible culprit, new research suggests. Supernovas, the vigorous explosions of massive stars, might have shoved much of the matter surrounding our galaxy deep into space, preventing a horde of tiny companion galaxies from forming in the first place.

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