NGC 6888：新月星云
(原标题: NGC 6888: The Crescent Nebula)
2025-11-28
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NGC 6888，也被称为新月星云，直径约25光年，是一个由其中心大质量恒星吹出的宇宙气泡。这张深望远镜图像包括窄带图像数据，以隔离来自氢原子和氧原子的光。氧原子产生的蓝绿色似乎遮蔽了星云的褶皱和细丝。在星云内部可见，NGC 6888的中心恒星被归类为沃尔夫-拉叶星（WR 136）。这颗恒星在强烈的恒星风中剥离其外层，每隔1万年就会喷出相当于太阳质量的物质。事实上，新月星云的复杂结构很可能是这种强风与早期喷射出的物质相互作用的结果。这颗恒星以惊人的速度燃烧燃料，接近其恒星生命的尽头，它最终会在一场壮观的超新星爆炸中爆炸。NGC 6888位于星云丰富的天鹅座，距离地球约5000光年。
查看原文解释
NGC 6888, also known as the Crescent Nebula, is a about 25 light-years across, a cosmic bubble blown by winds from its central, massive star. This deep telescopic image includes narrowband image data, to isolate light from hydrogen and oxygen atoms. The oxygen atoms produce the blue-green hue that seems to enshroud the nebula's detailed folds and filaments. Visible within the nebula, NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years. In fact, the Crescent Nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life, this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away.
© Greg Bass