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.
南方周末：决赛第三天结束时，现场一直等到欧洲时间次日凌晨两点多才公布结果。那五个多小时的等待过程中，你都在做些什么？
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