What is a supergiant star?

Supergiants are stars with 10 and 70 solar materials. It is one of the smallest known stars, located at the top of the Hertzsprung-Russell diagram, which maps the star luminosity against the spectral type. Like most other types of stars, supergiants come in all colors: red supergiants, blue supergiants, yellow supergiants, etc. They live fast (10-50 million years) and die hard (they form a black hole or a neutron star).

Stars even more massive than supergiants, between 70 and 120 solar materials, are called hypergierships. Stars much more massive than 120 solar masses cannot exist because they blow nuclear reactions before they can fully create. The more massive the star, the more intense the solar wind and the more its mass losing. Short -term and very massive supergiant stars Wolf -rayet are the most intense cosmic geysers that throw up 10 ^{-3 % of their matter into interstellar medium at speedlocated 2000 km/s.}

Because they last only 10-50 million years, supergiants tend to occur in relatively young cosmic structures such as open clusters, weapons of spiral galaxies and irregular galaxies. They are rarely found in elliptical galaxies that primarily contain old stars. It is expected that our Sun, much less massive than Supergiant, will have a total life of about 9 billion years to turn into a red giant, less massive than a supergiant, but still a very large average.

Supergiants tend to have radii of about 30 to 500 times larger than the sun, but sometimes huge and 1000 times larger and higher, as you canis majoris and vv cephei. Overall, giant stars are divided into giant, Supergiant and Hypergiant categories. Each of them has different paths of stellar development. The more massive the star, the shorter the shorter one and the more it pour it in the endt to the black hole.