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- Title Our galaxy
- Released 12/10/2007 11:36 am
- Copyright ESA/ J. Knödlseder et al.
The centre of the galaxy shines brightly in gamma rays with a specific energy of 511 keV.
This is the energy released during an encounter between an electron and its antimatter counterpart, the positron. It is not yet known what creates the antimatter particles.
The image shows the full sky at 511 keV.