Transcripts of 10688_Fermi_GR_Lobes_H264_1280x720_30

(Music) Narrator-Using data from NASA's Fermi Gamma-Ray Space Telescope, scientists have recently discovered a gigantic, mysterious structure in our galaxy. This never-before-seen feature looks like a pair of bubbles extending above and below our galaxy's center. These enormous, gamma-ray emitting lobes aren't immediately visible in the Fermi all-sky map, however, by processing the data, a group of scientists able to bring these unexpected structures into sharp relief. (Music) Each lobe is 25,000 light-years tall, and the whole structure may be only a few million years old. Within the bubbles extremely energetic electrons are interacting with lower-energy light to create gamma rays, but right now no one knows the source of these electrons. Are the bubbles remnants of a massive burst of star formation? Leftovers from an eruption by the supermassive black hole at our galaxy's center? Or did these forces work in tandem to produce them? Scientists aren't sure yet but the more they learn about this amazing structure, the better we'll understand the Milky Way. (Beeping) (Beeping)