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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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Keep up to date with the most important stories and the best deals, as picked by the PC Gamer team.，这一点在heLLoword翻译官方下载中也有详细论述
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