"The nebula appears to have distinct regions that capture different phases of its evolution — an outer shell of gas that was blown off first and consists mostly of hydrogen, and an inner cloud with more structure that contains a mix of different gases," NASA's blog post reads. The dark line that runs vertically through the nebula, giving it the cranial appearance, could be the result of "an outburst or outflow from the central star, which typically occurs as twin jets burst out in opposite directions." Both Webb's Near-Infrared Camera (NIRCam) and its Mid-Infrared Instrument (MIRI) were used to document the nebula.
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这五年，水利建设筑牢发展根基。5.68万亿元水利投资、181项重大工程开工建设，不仅是一组亮眼的数据，更标志着我国水网主骨架加快成形，水利基础设施正从“世界最大”向“世界一流”稳步迈进，为粮食连年丰收、经济持续增长筑牢安全屏障。
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