Wolf-Rayet 104's Pinwheel Star: A Cosmic Mystery Unraveled Introduction New research suggests that the enigmatic Wolf-Rayet 104 "pinwheel star" is more complex than previously believed, yet even less likely to be the catastrophic "death star" once theorized. WR 104: A Binary System with a Rotating Dust Pinwheel A study led by W. M. Keck Observatory Instrument Scientist Grant Hill has confirmed a long-held hypothesis: WR 104 consists of a binary system of massive stars orbiting each other every eight months. Their intense stellar winds collide, forming a rotating dust pinwheel that radiates in the infrared and shares the system's orbital period. Discovery of WR 104's Pinwheel Structure First identified at Keck Observatory in 1999, WR 104's pinwheel structure captivated astronomers with its striking imagery. The system comprises: A Wold-Rayet star an evolved, massive star emitting carbon-enriched winds. A more massive but less evolved OB star, whose wi...
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