Science1 hOctober 13, 2026, 04:10

Astronomers Find Possible Signs of Antimatter Annihilating Beyond the Milky Way

Using ESA's INTEGRAL telescope, astronomers mapped the Milky Way's 511 keV emission and suggest some positrons escape into intergalactic space, where they annihilate with electrons. This could explain why the galaxy appears to produce more antimatter than known sources can account for.

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Astronomers Find Possible Signs of Antimatter Annihilating Beyond the Milky Way

The positron-electron annihilation signal has a characteristic energy of 511 keV
Data came from the European Space Agency's INTEGRAL telescope
Most of the emission originates in the galaxy's central regions
NASA's COSI telescope, launching in 2027, could confirm the faint signals

#ESA#INTEGRAL#NASA

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Astronomers Find Possible Signs of Antimatter Annihilating Beyond the Milky Way

Gamma-ray search sets new limits on dark matter annihilation in the inner Milky Way

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