关于这张图
NASA image release November 9, 2010 To view a video about this story go to: <a href="http://www.flickr.com/photos/gsfc/5162413062">www.flickr.com/photos/gsfc/5162413062</a> From end to end, the gamma-ray bubbles extend 50,000 light-years, or roughly half of the Milky Way's diameter, as shown in this illustration. The bubbles stretch across 100 degrees, spanning the sky from the constellation Virgo to the constellation Grus. If the structure were rotated into the galaxy's plane, it would extend beyond our solar system. Hints of the bubbles' edges were first observed in X-rays (blue) by ROSAT …
