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.
Astronomical terms plus a letter: COMETH, NOVAK, START, SUNG
，这一点在Line官方版本下载中也有详细论述
他向BBC補充，最近幾個月與美國簽署的貿易協議並不是具備傳統條約那種明確且具法律約束力的協議，因此留有進一步變動的空間。
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Мощный удар Израиля по Ирану попал на видео09:41