What Is a Galactic Wind

What is a galactic wind?

A) a jet of ionized particles shot out of a starburst galaxy
B) hot gas erupting into intergalactic space from a large superbubble
C) the heat (infrared radiation) emitted by dust grains in the large molecular clouds of starburst galaxies
D) the cooler gas pushed out of a starburst galaxy by the intense radiation pressure
E) a wind created by the expansion of the universe that can move galaxies around

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