APOD:2015.9.22

Sweet丿Kim (金) 天王星
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发表于:2015-09-24 13:05 [只看楼主] [划词开启]

阿根廷.Bosque Alegre站上空的银河 

影像提供与版权: 

Sebastián D' Alessandro

说明: 

天空的这些光痕到底是什么?先讲最重要的─弧状结构是我们银河系的中央盘面。在银河盘面上,数百万颗遥远恒星杂散在黝黑的尘埃带之间。较难辨认的则是影像中右方,从地平线射出、几乎垂直上指的光束。


这道光束是黄道光,源自阳光受到我们太阳系内尘埃的散射,尤其在刚日落或将日出之时偶而会意外地明显。在影像前景,则有数座隶属于阿根廷.国立Cordoba大学.Bosque Alegre天文物理站的望远镜。此天文站会举办周末参观活动,而所进行的研究遍及许多天体,包括彗星、活跃星系与星系团。这幅主题影像摄于本月月初。

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Milky Way over Bosque Alegre Station in Argentina 

Image Credit & Copyright: Sebastián D' Alessandro; Rollover Annotation: Judy Schmidt

Explanation: What are those streaks of light in the sky? First and foremost, the arching structure is the central band of our Milky Way galaxy. Visible in this galactic band are millions of distant stars mixed with numerous lanes of dark dust. Harder to discern is a nearly vertical beam of light rising from the horizon, just to the right of the image center. This beam is zodiacal light, sunlight scattered by dust in our Solar System that may be surprisingly prominent just after sunset or just before sunrise. In the foreground are several telescopes of the Bosque Alegre Astrophysical Station of the National University of Cordoba in Argentina. The station schedules weekend tours and conducts research into the nature of many astronomical objects including comets, active galaxies, and clusters of galaxies. The featured image was taken early this month.




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