WR 124 is a Wolf–Rayet star in the constellation of Sagitta surrounded by a ring nebula of expelled material known as M1-67. It is one of the fastest runaway stars in the Milky Way moving away from the center of the galaxy with a radial velocity around 200 km/s.
Wolf–Rayet stars are a rare set of stars with unusual spectra showing prominent broad emission lines of ionized helium and highly ionized nitrogen or carbon. WR 124 is about 15% hydrogen with most of the remaining mass being helium.
WR 124 is surrounded by an intensely hot nebula formed from the star’s extreme stellar wind. It is expanding at a over 150,000 km/h and is about 6 light-years across.
Image Credit: NASA / ESA