暗狼星雲
The Dark Wolf Nebula

來源:William Vrbasso
Text:
Keighley Rockcliffe
(NASA
GSFC,
UMBC CSST,
CRESST II)|發表日期:2026-05-20
一隻“暗狼”潛伏在“口香糖”中。不,這可不是謎語!今天的圖片展示的是“暗狼星雲”(Sandqvist–Lindroos 17 ),這是一團幽幽的塵埃雲,嵌在天蠍座的Gum 55 (RCW 113 )星雲之中。雖然塵埃對我們來說是種“害蟲”,但在為恆星誕生創造必要條件方面,它卻起著至關重要的作用。 “暗狼”吸收了Gum 55 中年輕恆星發出的強烈紫外線和可見光,並將其以更長的波長(主要是紅外線)重新輻射出來。這阻止了高能光線加熱該區域的氣體。 當氣體區域足夠冷卻時,引力便會接管,促使氣體坍縮成恆星。塵埃不僅充當著星際恆溫器的角色,更是單個氫原子相遇並形成分子氫的媒介——分子氫正是恆星的構成基石。這看似陰森的“暗狼”,實則是宇宙生命的先驅。
原文:A dark wolf lies in gum. No, this isn’t a riddle! Today's image features the Dark Wolf Nebula (Sandqvist–Lindroos 17), a spooky dust cloud embedded within the Gum 55 (RCW 113) Nebula in the Scorpius constellation. While dust is a pest to us, it serves a vital role in creating the necessary conditions for stars to be born. The Dark Wolf absorbs the intense ultraviolet and visible light emitted by young stars in Gum 55 and re-emits it at longer, mainly infrared, wavelengths. This prevents the higher energy light from heating up the gas in the region. When a region of gas is cool enough, gravity takes over and causes the gas to collapse into a star. Not only does dust act as an interstellar thermostat, but it is also the meet-cute for single hydrogen atoms forming molecular hydrogen, the building block for stars. The seemingly sinister Dark Wolf is actually a harbinger of cosmic life.
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