IC 342:隐藏的星系



IC 342: The Hidden Galaxy in Camelopardalis
Image Credit & Copyright:
Daniel Feller

Explanation: Similar in size to large, bright spiral galaxies in our neighborhood, IC 342 is a mere 10 million light-years distant in the long-necked, northern constellation Camelopardalis. A sprawling island universe, IC 342 would otherwise be a prominent galaxy in our night sky, but it is hidden from clear view and only glimpsed through the veil of stars, gas and dust clouds along the plane of our own Milky Way galaxy. Even though IC 342’s light is dimmed and reddened by intervening cosmic clouds, this sharp telescopic image traces the galaxy’s own obscuring dust, young star clusters, and glowing pink star forming regions along spiral arms that wind far from the galaxy’s core. IC 342 may have undergone a recent burst of star formation activity and is close enough to have gravitationally influenced the evolution of the local group of galaxies and the Milky Way.

Tomorrow’s picture: light-weekend

IC 342:隐藏的星系
Daniel Feller

说明: 大小和我们附近的明亮大螺旋星系相当的IC 342,位于有长长脖子的鹿豹座之内,距离我们只有1千万光年远。IC 342是个庞大的宇宙岛,所以本来应是我们夜空中一个很吸睛的星系,但因为受到银河系盘面的恒星、云气和尘埃之遮掩,只能隐约窥其芳踪。虽然IC 342发出的光因受到居间的宇宙云之消光而变暗,这幅清晰的望远镜影像,还是能呈现这个星系的尘埃云、年轻恒星团、以及从星系核伸展而出的长长螺旋臂上之粉红恒星诞生区。IC 342最近可能刚发生一次猛爆的恒星诞生活动,此外它也够近,所以在重力上对本星系群和我们银河系的演化都有影响。

明日的图片: light-weekend