Copyright:CEDIC Team
原文:
The faint and somehow menacing cometary globule CG4 reaches through the center of this deep southern skyscape. About 1,300 light-years from Earth toward the constellation Puppis, its head is about 1.5 light-years in diameter and its tail about 8 light-years long. That’s far larger than the Solar System’s comets that it seems to resemble. In fact, the dusty cloud contains enough material to form several Sun-like stars and likely has ongoing star formation within. How its distinctive form came about is still debated, but its long tail trails away from the Vela Supernova remnant near the center of the Gum Nebula, while its head could represent the rupture of an originally more spherical cloud. Still, the edge-on spiral galaxy also near picture center is not actually being threatened by CG4. The galaxy lies in the distant background more than 100 million light-years away.
中文翻譯:
在深邃的南方天空中，神秘而微弱的彗星雲 CG4 伸展穿越畫面中央。CG4 距離地球約 1,300 光年，位於 Puppis 星座，其頭部直徑約 1.5 光年，尾部長達 8 光年。這比我們太陽系的彗星大得多！實際上，這個多塵埃的雲團包含了足夠的物質來形成數顆類太陽的恆星，並且可能在內部進行著星際形成。
CG4 獨特的形狀來源仍然是熱門討論的話題。它那長長的尾部向遠處 Vela 超新星遺骸延伸，位於 Gum 星雲的中央，而其頭部則可能代表一個最初更為球形的雲層的破裂。不過，畫面中央的邊緣螺旋星系並不受到 CG4 的威脅，它其實位於距離我們超過 1 億光年以外的遙遠背景中。
#彗星雲CG4 #星際形成 #宇宙奇觀 #南方天空 #Puppis星座 #Vela超新星 #Gum星雲 #深空攝影 #天文學 #探索宇宙
快來和我一起探索這個宇宙的奧秘吧！
來源:NASA每日圖片
