Red+Supergiants+2A

Red Supergiants - A star that is similar in nature but bigger in size than a red giant tytpically they span severeal hundred times the diameter of the sun. Also they are around ten times the mass of our sun.They belong to the luminocity class I and are of spectral type M or K. The supergiant phase is shortlived, lasting only between a few hendred thousend to a million years. They are above a main sequence star and are the end result of the death of a main sequence star The death of a red supergiant can result in a supernova explosion. This may result in the creation of a neutron star or a black hole. . a red supergiant engulfing a small planet. A Red Supergiant is above the main sequence and are the largest stars in the universe.

The surface temperature of a red supergiant is anywhwere from 3500 - 4500 degrees kelvin. WOW kids thats hot! Even so, red supergiants are relatively cool compared to other stars. The mass of many red supergiants allow them to eventually fuse elements up to iron. Near the end of their lifetimes, they will develop layers of heavier and heavier elements with the heaviest at the core. They are the largest stars in the universe in terms of physical size (volume), although they are not the most massive. The star starts off as a nebula, then turn into a protostar, the next stage is the main sequence star, after that is a red supergiant, when that star dies a supernova occurs resulting in one of two things, a neutron star or a black hole.