这个螺旋星系即便不是最完美的,至少也是最上镜者之一。以正面华丽亮相的 M74,是一个位于双鱼座内的宇宙岛,它距离我们约3200万光年,拥有至少1000亿颗恒星。M74属于Sc型星系,在它宏伟壮丽的螺旋臂上布满了明亮的蓝色星团和幽暗的宇宙尘埃带。这张高清图片是根据哈勃先进巡天相机在2003及2005年拍摄的照片合成的,它涵盖了M74正面约30000光年的区域,主要记录了氢原子发出的辐射,突出了星系中大型恒星诞生区的红色光芒。最近,许多天文学家正在追踪一颗出现在M74中的明亮超新星。
更多天文精彩文章请关注网易博客小组:天文爱好者。
Explanation: If not perfect, then this spiral galaxy is at least one of the most photogenic. An island universe of about 100 billion stars, 32 million light-years away toward the constellation Pisces, M74 presents a gorgeous face-on view. Classified as an Sc galaxy, the grand design of M74's graceful spiral arms are traced by bright blue star clusters and dark cosmic dust lanes. Constructed from image data recorded in 2003 and 2005, this sharp composite is from the Hubble Space Telescope's Advanced Camera for Surveys. Spanning about 30,000 light-years across the face of M74, it includes exposures recording emission from hydrogen atoms, highlighting the reddish glow of the galaxy's large star-forming regions. Recently, many astronomers are tracking a bright supernova that has been seen in M74.
每日天文一图(APOD)是美国宇航局天体物理学部每日定期发布的天文图片,并配有专业的简短解释,是小子时常光顾的地方,地址为:http://apod.nasa.gov/apod/。现将部分酷图转来并对原文解释做了翻译,英文及天文知识均有限,译错之处敬请各位指正。
秋天的麦兜 2013年8月11日。
评论