Copyright:
Maurice Toet
原文:
There is no sea on Earth large enough to contain the Shark nebula. This predator apparition poses us no danger, though, as it is composed only of interstellar gas and dust. Dark dust like that featured here is somewhat like cigarette smoke and created in the cool atmospheres of giant stars. After being expelled with gas and gravitationally recondensing, massive stars may carve intricate structures into their birth cloud using their high energy light and fast stellar winds as sculpting tools. The heat they generate evaporates the murky molecular cloud as well as causing ambient hydrogen gas to disperse and glow red. During disintegration, we humans can enjoy imagining these great clouds as common icons, like we do for water clouds on Earth. Including smaller dust nebulae such as Lynds Dark Nebula 1235 and Van den Bergh 149 & 150, the Shark nebula spans about 15 light years and lies about 650 light years away toward the constellation of the King of Aethiopia (Cepheus).
中文翻譯:
🦈 Shark Nebula: 一個壯觀的天體奇觀！
地球上沒有任何海洋足以容納這個捕食者般的星雲。雖然Shark Nebula的外觀可能讓人感到驚豔，但它實際上只由星際氣體和塵埃組成，對我們並沒有危險。這裡的黑暗塵埃像香煙煙霧一樣，是在巨星的冷卻大氣中生成的。當這些氣體被排出並透過重力重新凝聚，巨型恆星能夠利用其高能光輝和快速的恆星風刻畫出富有細緻結構的星雲。它們所產生的熱量會使混濁的分子雲蒸發，並導致周圍的氫氣發光，呈現紅色。在這個分解的過程中，我們人類能夠享受想像這些壯麗的雲彩，正如我們在地球上幻想水雲一般。
Shark Nebula的大小約為15光年，並且距離我們大約650光年，位於埃提俄比亞王（Cepheus）星座中，包括小型塵埃星雲，如Lynds Dark Nebula 1235和Van den Bergh 149 & 150。
#SharkNebula #星雲 #宇宙奇觀 #星際塵埃 #宇宙 #太空探索 #Cepheus #埃提俄比亞王 #LyndsDarkNebula #VanDenBergh #天文學 #天體物理學
來源:NASA每日圖片
