Bubbles spill out of the Milky Way

LOS ANGELES The massive structures each stretch 25,000 light years and emit about the same amount of energy as 100,000 exploding stars.

Researchers said this could be evidence of star formation a few million years ago or it could have been created when a supermassive black hole in the center of our galaxy swallowed up gas and dust.

The bubbles do not envelope earth but instead spread out in a different plane.

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