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The images above show the Orion Nebula with a huge cloud of high-temperature gas discovered by XMM-Newton. The left panel is an X-ray image obtained with XMM-Newton, with the hot gas seen as a red haze. The right panel, a Spitzer infrared image of the Orion Nebula overlaid with XMM-Newton X-ray data (in blue), shows the newly discovered hot gas cloud.© (Left) XMM-Newton EPIC (Guedel et al.); (Right) AAAS/Science (ESA XMM-Newton and NASA Spitzer data)

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