Scientists may have finally hit upon the possible mysterious sources that have pumped heat and kept alive the fiery hot gas that has recently been detected surrounding the Milky Way but has so far remained unexplained. Scientists may have finally hit upon the possible mysterious sources that have pumped heat and kept alive the fiery hot gas that has recently been detected surrounding the Milky Way but has so far remained unexplained. Astronomy Phys.org – latest science and technology news stories