190212期:蓝色彗星遇到蓝色恒星

蓝色彗星遇到蓝色恒星

那个朝向昴星团的天体是什么?它似乎是彗星C / 2016 R2(泛星),但在此处,不要被它的外表所欺骗。在最右侧的背景中是著名的昴星团,它被大量的年轻恒星所发出的蓝色光笼罩,绝大部分是来自年轻的大质量恒星。 在影像的左侧,是内太阳系的访客–泛星彗星,一团来自外太阳系、不停在翻滚、目前拖着一个长长的离子尾巴的冰块,它泛蓝的色泽,则主要来自含量异常高的电离化的一氧化碳。泛星彗星实际上正朝着影像的顶部移动,它的离子尾背离太阳,同时受到来自太阳的复杂太阳风离子的影响。 这个目前可以通过小望远镜看到,即使它在五月初会运行到离太阳最近的位置,但它会不断地远离地球,并且在逐渐之中。

翻译:银河说翻译组 岑
审核:银河说顾问组 tequila

Blue Comet Meets Blue Stars 
Credit & Copyright: Tom Masterson (Transient Astronomer)

Explanation: What’s that heading for the Pleiades star cluster? It appears to be Comet C/2016 R2 (PanSTARRS), but here, appearances are deceiving. On the right and far in the background, the famous Pleiades star cluster is dominated by blue light from massive young stars. On the left and visiting the inner Solar System is Comet PanSTARRS, a tumbling block of ice from the outer Solar System that currently sports a long ion tail dominated by blue light from an unusually high abundance of ionized carbon monoxideComet PanSTARRS is actually moving toward the top of the image, and its ion tail points away from the Sun but is affected by a complex solar wind of particles streaming out from the Sun. Visible through a small telescope, the comet is fading as it recedes from the Earth, even though it reaches its closest point to the Sun in early May.

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