Type II supernova
...that stars must have at least 9 times the mass of the Sun in order to undergo a core collapse and become a Type II supernova ?
...that <a href="./Star" id="mwD5M" rel="mw:WikiLink" title="Star">stars</a> must have at least 9 times the <a href="./Mass" id="mwD5Q" rel="mw:WikiLink" title="Mass">mass</a> of the <a href="./Sun" id="mwD5U" rel="mw:WikiLink" title="Sun">Sun</a> in order to undergo a core collapse and become a <b id="mwD5Y"><a href="./Type_II_supernova" id="mwD5c" rel="mw:WikiLink" title="Type II supernova">Type II supernova</a></b> <i id="mwD5g">(example pictured)</i>?