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10  | 十五年，禮部員外郎鄭善夫言：「日月交食，日食最為難測。蓋月食分數，但論距交遠近，別無四時加減，且月小闇虛大，八方所見皆同。若日為月所掩，則日大而月小，日上而月下，日遠而月近。日行有四時之異，月行有九道之分。故南北殊觀，時刻亦異。必須據地定表，因時求合。如正德九年八月辛卯日食，曆官報食八分六十七秒，而閩、廣之地，遂至食既。時刻分秒，安得而同？今宜按交食以更曆元，時刻分秒，必使奇零剖析詳盡。不然，積以歲月，躔離朓朒，又不合矣。」不報。十六年以南京戶科給事中樂頀、工部主事華湘通曆法，俱擢光祿少卿，管監事。 |
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