Meg ##han : The very high number of stars forming in NGC 253 generates a lot of heat , blowing winds off their surfaces , and these streams of heated stellar material unite to push away the surrounding gas that has not formed stars . : New data have mapped a ` ` superwind '' flowing out of a nearby galaxy . Urry : There is enough energy in the wind to carry away a lot of gas in the galaxy . She says this is an answer to why galaxies simply do not have more stars . Urry : It 's because cold gas , which forms stars , is being sucked out of galaxies .
Meg ##han : New data have mapped a ` ` superwind '' flowing out of a nearby galaxy . Urry : There is enough energy in the wind to carry away a lot of gas in the galaxy . She says this is an answer to why galaxies simply do not have more stars . Urry : It 's because cold gas , which forms stars , is being sucked out of galaxies .