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Massive stars are the “movers and shakers” <strong>of</strong> <br />

the interstellar medium. Their powerful <br />

feedback processes include: <br />

Radiation <br />

Jets and outflows <br />

Stellar winds <br />

HII regions <br />

Supernovae <br />

These phenomena heat gas, inject turbulence, <br />

skew stellar populations, raise galactic <br />

metallicity, and destroy molecular clouds. <br />

HST image <strong>of</strong> compact star forming region Sh 2-­‐106. <br />

Credit: NASA & ESA

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