Copyright:William Vrbasso
Text:
Keighley Rockcliffe
(NASA
GSFC,
UMBC CSST,
CRESST II)
中文翻譯:
在星空中，有一片神秘的雲彩，被稱為Dark Wolf Nebula（黑狼星雲）。這片雲彩位於Scorpius（天蝎座）星座的Gum 55（甘姆55）星雲裡，看起來有點可怕，但其實它是星星誕生的好地方！雲中的塵埃吸收了年輕星星發出的光，有助於讓周圍的氣體變得涼爽。當氣體變冷，重力就能把它們聚集在一起，形成星星！這片黑狼星雲不僅是宇宙的調溫器，還幫助氫原子變成分子氫，為星星的誕生鋪平道路。看起來陰森的黑狼，其實是宇宙生命的先兆！
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.
來源:NASA每日圖片
