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。关于这个话题，下载安装 谷歌浏览器 开启极速安全的 上网之旅。提供了深入分析
Юлия Сычева (корреспондент)
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.