High Mass Star begins life the same as a Low Mass Star. The star is formed from a bigger clump than the Low Mass Star. which compresses the clump , which in turn superheats the massive clump. When the clump becomes a main-sequence star, it is much hotter, bluer, and more luminous than the Sun. The greater luminosity means that the star burns fuel faster. Because of this, the High Mass Star takes only 100 million years to burn its fuel rather than 10 billion like the Sun and thus ages rapidly.

s the High Mass Star runs out of hydrogen it swells and grows cooler, much the same as a Low Mass Star. The evolutionary difference is that the High Mass Star passes through a pulsating Yellow Giant phase before it becomes a Red Giant.

he greater mass of the star creates an intense gravitational compression of the star's core. As the core is compressed, the temperature rises and fuel is burned at a frenzied pace in order to maintain the pressure that supports the star. This high temperature fuses progressively heavier elements to provide an energy source that converts helium into carbon, carbon into oxygen, and so on until silicon is fused into iron. Iron does not provide energy when fused and this causes the star's demise as it can no longer maintain enough pressure to support itself. The core collapses in less than a second and triggers a cataclysmic Supernova explosion which sends the heavy elements it made flying into space. Such an explosion leaves either a Black Hole or a Neutron Star