Copyright:Martin Pugh
原文:
Magnificent island universe NGC 2403 stands within the boundaries of the long-necked constellation Camelopardalis. Some 10 million light-years distant and about 50,000 light-years across, the spiral galaxy also seems to have more than its fair share of giant star forming HII regions, marked by the telltale reddish glow of atomic hydrogen gas. The giant HII regions are energized by clusters of hot, massive stars that explode as bright supernovae at the end of their short and furious lives. A member of the M81 group of galaxies, NGC 2403 closely resembles another galaxy with an abundance of star forming regions that lies within our own local galaxy group, M33 the Triangulum Galaxy. Spiky in appearance, bright stars in this colorful galaxy portrait of NGC 2403 lie in the foreground, within our own Milky Way.
中文翻譯:
壯觀的島宇宙 NGC 2403 位於長頸星座 Camelopardalis 的邊界上。這個螺旋星系距離我們約1,000萬光年，直徑約50,000光年，還似乎擁有比其他星系更多的巨型恒星形成 HII 區域，這些區域以氫原子的紅色光芒為特徵。這些巨型 HII 區域由一群炙熱、龐大的恆星所驅動，這些恆星在它們短暫而激烈的生命結束時會以明亮的超新星形式爆炸。作為 M81 星系群的成員，NGC 2403 與我們自身鄰近星系群 M33（即三角洲星系）非常相似，兩者皆擁有豐富的恆星形成區域。在這幅多彩的 NGC 2403 星系肖像中，前景中的明亮恆星來自我們自己的銀河系。
#NGC2403 #Camelopardalis #HIIRegions #StarFormation #Supernova #M81Group #M33 #TriangulumGalaxy #Astrophotography #Universe #MilkyWay
來源:NASA每日圖片
