Unraveling the Complexity of Giant Bubbles Around the Milky Way

The eROSITA bubbles, a pair of huge, symmetrical blobs of gas extending high above and below the Milky Way's galactic plane, have been found to be more complex than previously thought. Data from the Suzaku satellite suggests that the X-ray glow of the bubbles is due to the higher density of the gas inside them, rather than their assumed higher temperature. The bubbles are thought to have been formed by nuclear star formation, rather than black hole activity, and are connected to smaller but similarly shaped blobs of gas called Fermi bubbles. Further research is needed to better understand the formation of these structures.