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Narrator-Using data from NASA's Fermi Gamma-Ray Space Telescope, scientists have recently

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discovered a gigantic, mysterious structure in our galaxy.

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This never-before-seen feature looks like a pair of bubbles extending above

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and below our galaxy's center.

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These enormous, gamma-ray emitting lobes aren't immediately visible in the Fermi all-sky

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map, however, by processing the data, a group of scientists

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able to bring these unexpected structures into sharp relief.

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Each lobe is 25,000 light-years tall, and the whole structure may be only

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a few million years old. Within the bubbles

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extremely energetic electrons are interacting with lower-energy light to create

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gamma rays, but right now no one knows the source of these electrons.

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Are the bubbles remnants of a massive burst of star formation?

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Leftovers from an eruption by the supermassive black hole at our galaxy's center?

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Or did these forces work in tandem to produce them? Scientists aren't sure yet

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but the more they learn about this amazing structure, the better we'll understand