Dead stars in the Milky Way’s companion galaxy cause a cocoon of gamma rays

The mysterious ultraluminous gamma-ray emissions in the giant bubbles spewed by our galaxy may finally have an explanation.

The researchers used data from the Gaia and Fermi space telescopes to search through the Fermi Bubbles, a pair of colossal hourglass-shaped bubbles extending from its poles Galaxy and spans 50,000 light-years, to locate the source of the very bright gamma-ray emission spots.

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