Fermi Bubbles: Remodelling the Milky Way

Image courtesy NASA. If someone asked you what the galaxy looks like from afar, you might tell them it's a spiral. You'd be half-right. If you thought to include dark matter in your answer, you might say that it's a disk or a cloud, but you still wouldn't get full credit. Don't feel bad, though--there's more to the Milky Way's structure than meets the eye, and much of it was completely impossible for us to see up until very recently. When data from the Fermi Gamma-ray Space Telescope, launched i...