Wolf rayets exist in very rare quantity. Wolf rayets are dence spheres of iron and they explode untill they collapse into a wormhole. they are rayets of O spectrum suns after a blue supergiant goes hypernova. Wolf Rayets are like pulsars of completely iron and they are very dence, they are roughly twice the radius of J01-A. they only last for less than a millennium which is why it is hard to spot them.

Wolf Rayets: