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Like a whirl of shiny flakes sparkling in a snow globe, Hubble catches an instantaneous glimpse of many hundreds of thousands of stars moving about in the globular cluster M13, one of the brightest and best-known globular clusters in the northern sky.

據(jù)國外媒體報(bào)道，美國宇航局哈勃太空望遠(yuǎn)鏡拍到北部天空中最明亮最有名的球形星團(tuán)M13免费一级毛片免费一级，恰似一個(gè)天上"雪球"18禁无遮挡裸体露私密部位网站，里面有無數(shù)恒星在運(yùn)動(dòng)，如同連串的"雪片"在閃爍欧美三级全黄牲交视频。

Explanation: M4 is a globular cluster visible in dark skies about one degree west of the bright star Antares in the constellation Scorpius. M4 is perhaps the closest globular cluster at 7000 light years, meaning that we see M4 only as it was 7000 years ago, near the dawn of recorded human history. Although containing hundreds of thousands of stars and spanning over 50 light-years, M4 is one of the smallest and sparsest globular clusters known. A particularly unusual aspect for a globular cluster is M4's central bar of stars.

M4是一個(gè)肉眼可見的球狀星團(tuán)97seSe视频，位于天蝎座心宿二的東面約一度位置久操伊人。M4可能是最靠近我們的球狀星團(tuán)距離約7000光年可以免费看黄色视频的视频的视频，這意味著我們看到的是7000年以前的M4，即人類歷史有文字記載的開始階段网友自拍另类重口日韩AV，它跨越50光年包含有數(shù)10萬顆恒星男女內交网站在线观看。M4是已知在尺度及包含恒星數(shù)量上最小的球狀星團(tuán)。M4獨(dú)特之處是它中心的棒狀結(jié)構(gòu)男人扒女人添高潮视频动态。

Plates of globular cluster M3, taken with the 40cm refractor at Sheshan station of Shanghai Astronomical Observatory, are used by this work. The difference of epoch of these plates is up to 81years. The positions and absolute proper motions of 24 stars in ACT catalogue, which links with the Hipparcos Catalogue based on the International Celestial Reference System, are used as the reference frame. Using the central overlapping principle, the absolute proper motions of 534 stars in the region of about 100'×100' around the cluster are determined. After the membership determination of the stars which based on the data of proper motions, average absolute proper motion components for the cluster of -0.3±0.3 mas/yr in R.A.

本文使用上海天文臺(tái)佘山40厘米折射望遠(yuǎn)鏡拍攝的14張最長時(shí)間跨度為81年的球狀星團(tuán)M3底片的PDS掃描結(jié)果深夜福利爱爱视频，使用與 Hipparcos星表相聯(lián)系的基于國際大球慣性參考系的ACT星表中的 24顆恒星的位置和絕對(duì)自行為參考架，用中心重疊法進(jìn)行天體測量歸算丁香花高清在线观看，得到了這個(gè)星團(tuán)中心附近100'×100'天區(qū)內(nèi)534顆恒星的位置和絕對(duì)自行黄色操屄，并利用這些自行對(duì)成員概率進(jìn)行了估算，得到這個(gè)星團(tuán)的赤經(jīng)方向絕對(duì)自行為- 0.3±0.3mas/yr日本三级片网黄色，赤緯方向絕對(duì)自行為-3.1±0.3mas／yr日韩亚洲欧美。

disk globular cluster：盤族球狀星團(tuán)

dish 碟形天線 | disk globular cluster 盤族球狀星團(tuán) | dispersion measure 頻散量度

halo dwarf：暈族矮星

Hale Telescope 海爾望遠(yuǎn)鏡 | halo dwarf 暈族矮星 | halo globular cluster 暈族球狀星團(tuán)