Fisher Space Supernova Rainbow Titanium Nitride Bullet PenStars which are eight times or more massive than our Sun end their lives in a most spectacular way; they go supernova. A supernova is the most powerful and luminous explosion in space. Explosions so stellar they are bright enough to briefly outshine their entire galaxies, with outbursts containing mind boggling heat and force helping to heat up the interstellar medium, distribute heavy elements throughout the galaxy, and accelerate cosmic rays.