The hurricane blast of stellar winds and blistering ultravioletradiation within the cavity is now compressing the surrounding walls ofcold hydrogen . this is triggering a second stage of new star formation 空穴中星风的击波和炽热的紫外线辐射正在压缩周围冷氢气形成的墙。由此触发了第二阶段新恒星的形成。
