Galactic winds are high velocity stellar winds. The phenomena is caused by either strong stellar winds emanating from newly formed massive stars or as the result of the effects of supermassive black holes.
Galactic winds are strong stellar winds made up of charged particles, ejecta, and varying amounts of hot and cool gas. These gusts are caused by the release of ejecta by massive stars, spiral density waves, or supernovae. In galaxies with active galactic nuclei, galactic winds can also be driven by the effects of super-massive black holes.
Galactic winds are considered an important function in the evolution of a galaxy. The winds cause an outflow of gas and other materiel into the halo of a galaxy, while also facilitating the spread of metals around a galaxy. Galactic winds are also capable of blowing material out of a galaxy entirely and into the intergalactic medium.
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