私人密码

私人密码-解锁太空的奥秘是一款古长度、古面积、古时间、古货币等的换算参考资料类型的app，为您提供最新私人密码官方IOS版下载。

Theterm"astronomicalunit"wascoinedin1903.Priorto1938,theAUwasthemeandistancefromtheEarth-Moonsystem'scenterofmasstotheSunwithouttheperturbationofamajorplanet,orthehalf-lengthdiameterofanunperturbedellipticalorbitaroundtheSun.

In1976,theInternationalAstronomicalUnionissuedaseriesofthemostimportantunitsusedinastronomicalresearch,oneofwhichisthedistancebetweentheSunandtheEarthknownastheAstronomicalUnit(AU).AccordingtotheoriginaldefinitionoftheInternationalAstronomicalUnion,thedistancebetweentheSunandtheEarthis"theradiusoftheorbitofamasslessparticlemovingatanangularspeedof0.01720209895radiansperdayinacircularorbitwiththecenteroftheSununderthegravitationalinfluenceoftheSun."Thepublisheddataatthetimewas1AUequalto149597870.691km.

Inadditiontotheambiguityofthedefinitionitself,thereisanotherproblemthatisdifficulttoaccept:sinceitisa"fundamentalunit",itseemsthatitshouldbeafixednumber,butaccordingtothe1976InternationalAstronomicalUniondefinition,theastronomicalunitisaconstantlychangingnumber.First,themassoftheSunisdecreasing,causingtheastronomicalunittochangeslowly.Second,accordingtogeneralrelativity,thedefinitionofspacetimeisrelativeandisrelatedtothespacetimeinwhichtheobserverlives.Accordingtotheabovedefinition,theastronomicalunitsmeasuredindifferentpartsofthesolarsystemwillbedifferent,forexample,theastronomicalunitsmeasuredonJupiter(themostmassiveplanetinthesolarsystem)willbemorethan1,000kilometersdifferentfromtheastronomicalunitsmeasuredonEarth.

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1.增加相对重量计算器

2.优化计算的精度