The rare hypergiant star was one which shares similar characteristics with a supergiant star, but was a hundred times more massive than Sol. The theoretical lifespan of a hypergiant is one to two million years. Supposedly, like its supergiant companions, a hypergiant star will go supernova when it exhausts its supply of fuel and gravity crushes the inert remains.
Enterprise NX-01 was the first Earth starship to research a red hypergiant at close range in 2153; it was nearly a billion kilometers in circumference and was not expected to go supernova for another one hundred or two hundred years. (ENT: "Cogenitor")