Copyright:Eric Coles
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 are in the foreground, within our own Milky Way.
中文翻譯:
在長頸星座Camelopardalis（駱駝豹座）內，宏偉的島宇宙NGC 2403靜靜地存在。這個距離我們約10百萬光年，直徑約50,000光年的螺旋星系，似乎擁有超過正常比例的巨大HII區域，這些區域以原子氫氣體的紅色光芒而顯現。這些巨大的HII區域是由一群熱烈而巨大的恆星所驅動，這些恆星在其短暫而輝煌的生命結束時會以亮眼的超新星爆炸來回饋宇宙。作為M81星系群的成員，NGC 2403與屬於我們本地星系群的M33（三角座星系）極為相似，後者同樣擁有大量的恆星形成區域。在這幅色彩繽紛的NGC 2403星系畫作中，前景中的亮星則屬於我們自己的銀河系。
#NGC2403 #星系 #HII區域 #恆星形成 #超新星 #Camelopardalis #M81星系群 #M33 #星空 #宇宙之美 #天文愛好者 #探索宇宙
來源:NASA每日圖片
