Beyond the cloud's unusual shape, scientists see the nebula as a freeze-frame in the life of a star facing its final act. Elderly stars shed their outer layers in bursts, creating shells of gas and dust that expand. By observing the nebula at different wavelengths, researchers can sort out what material was molted first, how fast the star is losing mass, and which phase of decline Webb has caught.
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泰国第四大人口府孔敬府，借鉴中国“精准扶贫”理念，当地官员感慨“提供了解决贫困问题的勇气”。菌草技术在100多个国家“点草成金”。第七十三届联合国大会通过关于消除农村贫困问题的决议，把“精准扶贫”理念明确写入其中。中国的发展不仅改变了自己，也改变了世界。