| Project/Area Number |
20540241
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
SOMA Mitsuru National Astronomical Observatory of Japan, 光赤外研究部, 助教 (30187885)
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| Co-Investigator(Kenkyū-buntansha) |
TANIKAWA Kiyotaka 国立天文台, 理論研究部, 特別客員研究員 (80125210)
YAMAMOTO Tadato 国立天文台, 天文情報センター, 特別客員研究員 (00447898)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 日本書紀 / 続日本紀 / 日本天文学史 / 地球自転速度変動 / 日月食・星食 / 暦法 / 位置天文学 / 歴史天文学 / 地球自転変動 |
|---|
| Research Abstract |
We thoroughly investigated astronomical records, such as eclipses, and occultations, in Nihongi and Shoku-Nihongi, and by taking into account the variation of the Earth's rotation speed we clarified if the records given in them were correct or not. As a result we found that observational astronomy began in the 7^<th> century in Japan, that progression and retrogression alternated in the Japanese observational astronomy during the 7^<th> century, and that there were no observational records from the end of the 7^<th> century through the whole of the 8^<th> century. There must have been a change in the attitude toward observational astronomy at around the end of the 7^<th> century in Japan.
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