How stars form in galaxies remains a major open question in astrophysics. A new study sheds new light on this topic with the help of a data-driven re-analysis of observational measurements. The star-formation activity of typical, nearby galaxies is found to scale proportionally with the amount of gas present in these galaxies. This points to the net gas supply from cosmic distances as the main driver of galactic star formation.
Stars are born in dense clouds of molecular hydrogen gas that permeates interstellar space of most galaxies...
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