Milky Way Easter Eggs

This artist’s concept visualizes gamma-ray bubbles discovered by NASA’s Fermi Gamma-Ray Space Telescope. From end to end, the bubbles extend 50,000 light-years, or roughly half of the Milky Way’s diameter. Hints of the bubbles’ edges were first observed in X-rays (blue) by ROSAT, a Germany-led mission operating in the 1990s. The gamma rays mapped by Fermi (magenta) extend much farther from the galaxy’s plane.




Image Description
On a black backdrop speckled with tiny stars, large magenta lobes shaped like a giant vertical figure eight extend outward from a thin glowing disk seen edge-on. Credit: NASA’s Goddard Space Flight Center.
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