Dead stars in the Milky Way’s companion galaxy cause a gamma-ray cocoon

Dead stars in the Milky Way’s companion galaxy cause a gamma-ray cocoon

Mysterious ultra-bright gamma-ray emissions in giant bubbles ejected by our galaxy may finally have an explanation.

The researchers used data from the gaia Y fermi space telescopes to search through the Fermi bubbles, a pair of colossal hourglass-shaped bubbles that extend from the poles of the Milky Way and span 50,000 light-years, to track the source of very bright gamma-ray emission points.

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