They're typically seen in starburst galaxies, where there's a lot of star formation and large stars don't last very long. They typically explode soon after they're made where 'soon' is a million years.
Quotes about starburst (2 Quotes)
The end of the war won't produce a starburst of economic growth, nor will it unleash a tidal wave of business spending, ... Instead, we'll get just enough business and economic activity to keep us from slipping back into recession and to set us up for stronger growth next year.