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Gamma-ray bubbles at the galactic centre

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Gamma-ray bubbles 800x600

This artist’s conception shows an edge-on view of the Milky Way galaxy. Newly discovered gamma-ray jets (pink) extend for 27 000 light-years above and below the galactic plane, and are tilted at an angle of 15 degrees. Previously known gamma-ray bubbles are shown in purple. The bubbles and jets suggest that our galactic centre was much more active in the past than it is today.

Image credit: David A Aguilar (CfA)


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