- You may also be looking for a red giant.
A red supergiant is a type of star.
Beta Stromgren, which exploded in a supernova in 2366, was a red supergiant. (TNG: "Tin Man")
Idran, the primary of the Idran system, was a supergiant. (DS9: "Emissary")
The SS Tsiolkovsky spent eight months, from late 2363 to 2364, monitoring the collapse of a red supergiant into a white dwarf. (TNG: "The Naked Now")