By analyzing data from XMM-Newton, Spitzer, and Chandra, scientists have confirmed earlier suspicions that the ghostly arms represent regions of gas that are being violently heated by shock waves.

• 通过分析来自XMM-牛顿、斯必泽与钱德拉的数据，科学家证实了早期的猜想，即在朦胧的旋臂区域中，气体正被激波剧烈加热。