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bn:02808432n
Noun Named Entity
JA
太陽系力学時
EN
Barycentric Dynamical Time is a relativistic coordinate time scale, intended for astronomical use as a time standard to take account of time dilation when calculating orbits and astronomical ephemerides of planets, asteroids, comets and interplanetary spacecraft in the Solar System. Wikipedia
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IS A
時刻系
力学時
PART OF
力学時
Wikidata
JA
太陽系力学時

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