APOD090708 流向星宿二的暗星云之河
昨天的APOD我怎么觉得今年刚刚见过，非常眼熟的说。http://apod.nasa.gov/apod/ap090708.html
2009 July 8
The Dark River to Antares
http://apod.nasa.gov/apod/image/0907/RhoOphregion_jennings_r.jpg
Credit & Copyright: Jason Jennings
Explanation:
Connecting the Pipe Nebula to the colorful region near bright star Antares is a dark cloud dubbed the Dark River, flowing from the picture's left edge. Murky looking, the Dark River's appearance is caused by dust obscuring background starlight, although the dark nebula contains mostly hydrogen and molecular gas. Surrounded by dust, Antares, a red supergiant star, creates an unusual bright yellowish reflection nebula. Above it, bright blue double star Rho Ophiuchi is embedded in one of the more typical bluish reflection nebulae, while red emission nebulae are also scattered around the region. Globular star cluster M4 is just seen above and right of Antares, though it lies far behind the colorful clouds, at a distance of some 7,000 light-years. The Dark River itself is about 500 light years away. The colorful skyscape is a mosaic of telescopic images spanning nearly 10 degrees (20 Full Moons) across the sky in the constellation Scorpius. 经查，该图、文与APOD2004.8.9内容完全相同，所以成大的翻译也相同。至于北京天文馆，估计都放夏季长假了，或者说放暑假了吧。
大图就上面这么大，所以不再贴了。 成大的翻译http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap090708.html
心宿二與暗河
影像提供與版權: Jason Jennings
說明:
連接煙斗星雲(Pipe Nebula)和心宿二(Antares)之間的，是暱稱為暗河的流動雲氣，一路延伸至影像的左方。這條陰鬱的暗河是因為塵埃吸收了背景的星光所致，即使雲氣裡多半都是氫和分子氣體。深埋在塵埃之中的紅巨星心宿二，創造出異常的淡黃色星雲。在這之上的藍色反射星雲以及些許的紅色星雲之中，藍色雙星為心宿增四星(Rho Ophiuchi)。位在這些五彩繽紛的星雲之後，心宿二的右方為球狀星團M4，距離約為7,000光年，暗河則是500光年左右。上方這張色彩繽紛的馬賽克影像，其視野橫跨天蠍座10度(約20個滿月)左右。
::070821_13.jpg::漂亮五个字！
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