How massive can stars be !? Big, hefty stars live short violent lives that can profoundly affect their environment !

Massive Stars Resolved in the Carina Nebula
Credit: ESA, NASA, and J. Maíz Apellániz (Instituto de Astrofísica de Andalucía, Spain)

Isolating a massive star can be problematic, however, since what seems to be a single bright star might actually turn out to be several stars close together.