Webb's sharper view also hints at possible jets from the central star. The dark lane and the way gas appears to push outward near the top of the nebula suggest an ejection that may be shaping the cloud's symmetry, a common feature when aging stars throw material in opposite directions.
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'The finest in the world': Why the US is buying icebreakers from Finland，详情可参考爱思助手下载最新版本
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