In fact, the helmet is actually more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a surrounding molecular cloud.
其实这个宇宙头盔更像一个星际气泡,从这个气泡中心附近明亮的大质量恒星吹出一股疾风扫过周围的分子云。
MyCn18's hourglass shape is thought to have arisen from the expansion of a fast stellar wind within a slowly expanding cloud which is denser near its equator than its poles.
MyCn18之所以呈现出沙漏的外形,是因为一个缓慢扩张的云团里迅速向外冲去的恒星风造成的,其“赤道”附近的云团密度要大于两极。
The emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4, 000 light-years away.
这个发射星云在南天星座天坛座另一个巨大的暗分子云的边缘被发现,离我们约4000光年。
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