Researchers at Yunnan Observatories of the Chinese Academy of Sciences simulated the evolution of massive stars with masses ranging from 50 to 150 solar masses during the nitrogen sequence Wolf-Rayet (WNL) star phase. Researchers at Yunnan Observatories of the Chinese Academy of Sciences simulated the evolution of massive stars with masses ranging from 50 to 150 solar masses during the nitrogen sequence Wolf-Rayet (WNL) star phase. Astronomy Phys.org – latest science and technology news stories