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<p>If you look at massive galaxies teeming with stars, you might be forgiven in thinking they are star factories, churning out brilliant balls of gas. But actually, less evolved dwarf galaxies have bigger regions of star factories, with higher rates of star formation.</p> <p>Now, University of Michigan researchers have discovered the reason underlying this: These galaxies enjoy a 10-million-year delay in blowing out the gas cluttering up their environments. Star-forming regions are able to hang on to their gas and dust, allowing more stars to coalesce and evolve.</p> <p>In these relatively pristine dwarf galaxies, massive stars&mdash;stars about 20 to 200 times the mass of our sun&mdash;collapse into black holes instead of exploding as supernovae. But in more evolved, polluted galaxies, like our Milky Way, they are more likely to explode, thereby generating a collective superwind. Gas and dust get blasted out of the galaxy, and star formation qui

United statesSally oeyMorgan sherburneMichelle jecmenEdwin hubbleUniversity of michiganMethod of researchMilky wayBig bangAstrophysical journal lettersHubble space telescopeJames webb space telescopeMassive star mechanical feedback