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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当地时间2026年2月28日，美国华盛顿，美国副总统万斯（中）与国家情报总监图尔西·加巴德（左二）等人在战情室举行会议。（视觉中国/图）