NGC 6888 ：新月星雲
NGC 6888: The Crescent Nebula
來源：Greg Bass｜發表日期：2025-11-28
NGC 6888 ，又稱新月星雲，直徑約 25 光年，是一個被來自中央大質量恆星的風吹起的宇宙氣泡。這幅深度望遠鏡影像包含窄帶影像資料，用於分離氫原子和氧原子發出的光。氧原子產生的藍綠色調似乎籠罩著星雲細緻的褶皺和細絲。在星雲中可以看到，NGC 6888 的中心恆星被歸類為沃爾夫射線星（WR 136 ）。這顆恆星正在強烈的恆星風中脫落其外層包膜，每 10 , 000 年噴射出相當於太陽質量的物質。 事實上，新月星雲的複雜結構很可能是這種強風與早期噴出的物質相互作用的結果。這顆恆星以驚人的速度燃燒著燃料，接近恆星生命的終點，最終會在一次壯觀的超新星爆炸中轟然熄滅。NGC 6888 位於星雲豐富的天鵝座，距離地球約 5000 光年。
原文：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.
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