<p>NASA image release November 9, 2010
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</p><p>From end to end, the newly discovered gamma-ray bubbles extend 50,000 light-years, or roughly half of the Milky Way's diameter, as shown in this illustration. 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. 
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<a rel="nofollow" class="external text" href="https://www.flickr.com/people/24662369@N07">NASA Goddard Space Flight Center</a> from Greenbelt, MD, USA
2010-11-09 15:52
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/gsfc/5161800891/">Fermi Bubble Graphic</a>