... Star Atlas . ... New study resolves mystery of how massive stars form . Researchers found that radiation pressure does not limit the growth of massive stars. ... Earlier studies suggested that radiation pressure would blow away the raw materials of star formation before a star could grow much larger than about 20 times the mass of the Sun; yet astronomers observe stars much more massive than that. ... I think we can now consider the mystery of how massive stars are able to form to be solved. ...