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Multimillion-degree gas detected in X-rays (blue) by the Chandra X-ray Observatory comes from shock fronts, similar to sonic booms, formed by these stellar winds and by supernova explosions. This hot gas carves out gigantic bubbles in the surrounding cooler gas and dust shown here in infrared emission from the Spitzer Space Telescope (orange). The star-forming region, 30 Doradus, is one of the largest located close to the Milky Way and is found in the neighboring galaxy Large Magellanic Cloud. About 2, 400 massive stars in the center of 30 Doradus, also known as the Tarantula Nebula, are producing intense radiation and powerful winds as they blow off material. 30 Doradus is also known as an HII region, created when the radiation from hot, young stars strips away the electrons from neutral hydrogen atoms (HI) to form clouds of ionized hydrogen (HII). Because of its proximity and size, 30 Doradus is an excellent target for studying the effects of massive stars on the evolution of an HII region. The Tarantula Nebula is expanding, and researchers have published studies that attempt to determine what drives this growth. Release date November 10, 2011.
