The term massive star is not defined until late in the article It should be done earlier perhaps in the lede and I ll try to find a way to do it The term massive is also sometimes just used as an adjective eg stars less massive than 0 25 solar masses or one of the most massive stars known and sometimes to refer to a class of stars massive enough to go supernova the conventional definition This latter class is finally defined at the end of Solar System Mass but was used many times before that An edit was reverted presumably because it looked like an edit of someone else s comment due to the change in IP Alex talk contribs