Supergiant star

A supergiant star, in stellar classification, is a type of star of great mass and considerable brightness and size.

Supergiant stars are among the types of stars massive enough to end their lives as supernovae, with a massive gravitational collapse and explosion that ejects large amounts of gas and solid matter with a considerable amount of energy, sometimes leaving a remnant of a neutron star or black hole within a nebula of ejected stellar mass.