starticle第期原创双语推文
Itisanage-olddreamofstarryskyexploration.Inthousandsofyearsago,anexcellentstarobservationplacewasrecognizedbyancientChinesepeople,thatis,AstronomicalObservatoryinDengfeng,Zhengzhou.
人类对星空探索的渴望古已有之。追溯千年，中国古人心中就有一个绝佳的观星地，那便是郑州登封观星台。
AstronomicalObservatory观星台
Photo：MaJian
TheAstronomicalObservatoryScenicSpotislocatedinGaochengTown,Dengfeng,Zhengzhou.Thetown,whichwasoncethecityofYangchenginancienttime,isbesideYingRiver,borderedbytheSongShanMountaininthenorthandQishanMountaininthesouth.TheobservatoryisdividedintosevensectionsofthefrontandbackyardsincludingScreenWall,MountainGate,TasselDoor,Shadow-measuringPlatformofLordZhou,GrandTemple,AstronomicalObservatoryandZhongsiTemple,withreplicasofovertenkindsofastronomicalinstruments.TheShadow-measuringPlatformofLordZhouandtheobservatoryaretheoldestastronomicalarchitecturesextantinChina.
观星台景区位于郑州登封市告成镇，北依嵩山，南望箕山，处颍河之滨，曾是古代阳城所在地。前后院落共分照壁、山门、垂花门、周公测景台、大殿、观星台、螽斯殿七景，院内复制安装各种天文仪器10多种。其中，观星台景区内的周公测景台和观星台是中国现存最早的天文观测建筑。
Scaphe仰仪Photo：MaJian
Itisrecordedthattherewasa“Shadow-measuringPlatformofLordZhou”intheobservatoryscenicspotwhere,bymeasuringthelengthofshadowcastbythesun,ChouKungfoundthecenterofearth-Yangcheng,whichisthepresentGaocheng,anddefined“theSpringEquinox”,“theSummerSolstice”,“theAutumnalEquinox”and“theWinterSolstice”of“TheCenterofHeavenandEarth”.
观星台景区内有一“周公测景台”，史载，周公曾在此用土圭之法测土深，正日影，以求地中，从而确立阳城，即今告成镇为“天地中心”，并确立二十四节气中的冬至、夏至、春分、秋分四个节气。
Shadow-measuringPlatform周公测景台
Photo：LiuKebai
TheShadow-measuringPlatformofLordZhou,madeofbluestones,consistsoftwoparts.Thepedestal,workingasadial,isshapedasatrapezoidalconewithfoursidesindifferentlengths,narrowinthetopandlargeatthebottom.Andthecolumnnamedasagnomonhasatablingcoveringonthetopandwordsof“Shadow-measuringPlatformofLordZhou”carvedonthesouthside.Manyastronomersandcalendarists,suchasSengYixing(ZhangSui)andNangongYue,carriedoutastronomicalactivitieshereinhistory.
周公测景台用青石制作，分台座和石柱两部分。台座上小下大，呈梯形锥体，四边稍有偏斜，各边宽窄不等。石柱为表，台座为圭，表的顶端为屋宇式盖顶，南面刻有“周公测景台”等字。历史上不少天文学家、历法家如僧一行(张遂)、南宫说等都在这里进行过天文观测活动。
Shadow-measuringPlatform周公测景台
Yuandynastyobservatory,whichwas20metersawayfromtheShadow-measuringPlatformofLordZhou,wasthecenterstationofthe27astronomicalobservatoriesthroughoutthecountrysetupforastronomicalandgeodeticsurveying.Theobservatory,oneofthemostfamousastronomicalarchitecturesintheworld,wasbuiltbyGuoShoujing,anastronomerinYuandynasty,inthe13thyearofZhiyuanPeriodofYuanDynasty(BC).Through“measuringthesunshadowinthedaytimeandobservingstarsinthenight”,GuoShoujingfinishedShoushiCalendar,themostadvancedcalendarintheworldatthattime.Thisbookcorrectedthealgorithmoftwenty-foursolartermswithonlya26-seconddeviationinayear
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