2018年09月21日:不规则星系NGC 55-(Irregular Galaxy NGC 55)

2018年09月21日:不规则星系NGC 55-(Irregular Galaxy NGC 55)

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2018-09-21 / 0 评论 / 0 阅读 / 正在检测是否收录...

2018年09月21日:不规则星系NGC 55-(Irregular Galaxy NGC 55)
2018年09月21日:不规则星系NGC 55-(Irregular Galaxy NGC 55)--原图下载


Image Credit &Copyright: Martin Pugh
说明: 不规则星系NGC 55的外观咸认和大麦哲伦星系酷似。不过,大麦哲伦星系是我们银河系的伴星系,离我们约180,000光年远,而NGC 55则是玉夫座星群的成员,距离约在6百万光年左右。分类为不规则星系的大麦哲伦星系,在深空影像里形似棒盘星系。跨幅约50,000光年的NGC 55几乎侧向,它扁窄的外观和正向的大麦哲伦星系形成鲜明的对比。类似大麦哲伦星系有由大型恒星形成区所激发出的发射星云,NGC 55看似也正在形成新恒星。这张极为细緻的星系影像,突显了NGC 55之内,受到尘埃云切割的明亮星系核、特徵性的粉红恒星形成区、以及泛蓝的年轻星团。

原文:

Image Credit &Copyright: Martin Pugh
Explanation: Irregular galaxy NGC 55 is thought to be similar to the Large MagellanicCloud (LMC).But whilethe LMC is about 180,000 light-years awayand is a well known satellite of our own Milky Way Galaxy,NGC 55 is more like 6 million light-yearsdistantand is a member of theSculptor Galaxy Group.Classified as anirregular galaxy, indeep exposures the LMC itselfresembles a barred disk galaxy.Spanning about 50,000 light-years, NGC 55 isseen nearly edge-on though,presenting a flattened, narrow profile in contrastwith our face-on view of the LMC.Just as large star forming regions createemission nebulaein the LMC, NGC 55 is alsoseen to beproducing new stars.This highlydetailed galaxy portrait highlights a bright core crossed withdust clouds, telltale pinkish star forming regions, and young blue starclusters in NGC 55.

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