本帖最后由 gohomeman1 于 2009-6-19 17:50 编辑
今天的APOD是我们老祖先画的星图,在相当古老的敦煌。
http://apod.nasa.gov/apod/astropix.html
2009 June 19
Dunhuang Star Atlas
Credit and Copyright: J.-M. Bonnet-Bidaud (CEA, Saclay), F. Praderie (Obs. Paris) S. Whitfield (British Library)
Explanation:
This ancient Chinese map of planet Earth's northern sky is part of the Dunhuang Star Atlas, one of the most impressive documents in the history of astronomy. The oldest complete star atlas known, it dates to the years 649 to 684, discovered at the Silk Road town of Dunhuang in 1907. A recent analysis that examines the accuracy and projections used to make it notes the atlas marks positions of over 1,300 stars and outlines 257 Chinese star groups or asterisms.
这张古老的中国北天星图是敦煌出土的星图的一部分,天文历史中给人印象最深刻的文档之一。敦煌——丝绸之路重镇出土的最古老的星图完成于公元649~684年的唐朝时期,于1907年被发现(被帝国主义强占了)。最新的研究表明,星图准确的投影了1300多颗恒星,并标出了257个中国的星宿或星名。
The star positions in the hand drawn atlas were found to be accurate to within a few degrees. In this example showing the north polar region, a very recognizable Big Dipper, part of the modern constellation Ursa Major, lies along the bottom of the chart. An additional 12 charts depict equatorial regions in 30 degree sections and also include a grouping resembling the modern constellation Orion. The atlas is on display at the British Library in London to celebrate the International Year of Astronomy.
手绘星图的误差不到几度。例如本图中的北天级部分,星图下部赫然在目的北斗七星,现在时大熊座的一部分。另外的12个图表标示了北纬30°区域可见的,我们现在的猎户座天区。本图现在展示在大英博物馆中,作为国际天文年庆祝活动的一部分。
PS:落后就要挨打,就会被欺凌。我们经济要强大,军事更要强大。649年是太宗末年——贞观23年,684年武后已把持朝政。——gohomeman1 |
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