Wolf-Rayet star
A Wolf-Rayet star is a rare, massive, and extremely hot star characterized by strong stellar winds and significant mass loss. These stars are in a late stage of stellar evolution, often preceding a supernova explosion, and are known for their broad emission lines of ionized elements in their spectra.
Source: science.nasa.gov
APODs including "Wolf-Rayet star"
WR124: Stellar Fireball
09/11/1998
Some stars explode in slow motion. Rare, massive Wolf-Rayet stars are so tumultuous and hot they are disintegrating right before our telescopes. Glowing gas globs each over 30 times more massive than the Earth are being expelled by a violent stellar wind. Wolf-Rayet star WR124, visible near the image center, is thus creating the surrounding nebula known as M1-67. Why this star has been slowly blowing itself apart over the past 10,000 years remains unclear. WR124 is 15,000 light-years away towards the constellation of Sagitta.