 One of the most massive stars known is <unk> <unk> , which , with 100 – 150 times as much mass as the Sun , will have a lifespan of only several million years . Studies of the most massive open clusters suggests 150 M ☉ as an upper limit for stars in the current era of the universe . This represents an <unk> value for the theoretical limit on the mass of forming stars due to increasing radiation pressure on the <unk> gas cloud . Several stars in the <unk> cluster in the Large <unk> Cloud have been measured with larger masses , but it has been determined that they could have been created through the collision and merger of massive stars in close binary systems , <unk> the 150 M ☉ limit on massive star formation . 
