2 giant blobs at the core of our galaxy are spewing radiation. Scientists don't know how they got there.

September 16, 2019

It's not easy to make big balls of hot gas. For starters, you need energy, and a lot of it. The kind of energy that can spread hot gas to a distance of over 25,000 light-years doesn't come easily to a typical galaxy. However, the peculiar orientation of the Fermi Bubbles -- extending evenly above and below our galactic center -- is a strong clue that they might be tied our central supermassive black hole, known as Sagittarius A*.