"WASHINGTON -- NASA's Fermi Gamma-ray Space Telescope has unveiled a previously unseen structure centered in the Milky Way. The feature spans 50,000 light-years and may be the remnant of an eruption from a supersized black hole at the center of our galaxy."
![[Image: 498883main1_DF3_Fermi_bubble_art_labels-300.jpg]](http://www.nasa.gov/images/content/498883main1_DF3_Fermi_bubble_art_labels-300.jpg)
NASA
![[Image: 498883main1_DF3_Fermi_bubble_art_labels-300.jpg]](http://www.nasa.gov/images/content/498883main1_DF3_Fermi_bubble_art_labels-300.jpg)
NASA