In the study of variation of the earth’s rotation based on the records of some ancientastronomical events, the timing records of ancient astronomical events and phenomena, suchas solar and lunar eclises and lunar occ...In the study of variation of the earth’s rotation based on the records of some ancientastronomical events, the timing records of ancient astronomical events and phenomena, suchas solar and lunar eclises and lunar occultation, are important components of the data.The reliable records, especially those from the countries and regions with advanced an-cient astronomy and timing technology, contain valuable information on the variation展开更多
Although the Japanese records of central or near central solar eclipses (i.e. the total, annular and total-annular eclipses) are not very old, so long as their documents definitely recording the observational place, d...Although the Japanese records of central or near central solar eclipses (i.e. the total, annular and total-annular eclipses) are not very old, so long as their documents definitely recording the observational place, date and phenomenon of the eclipse or the parameters can be defined through some textual researches even if展开更多
In abundant old observational records of lunar eclipses in ancient China, some with timing of lunar eclipse phase are significant to the study of secular variation and fluctuation of the Earth’s rotation.Among the ov...In abundant old observational records of lunar eclipses in ancient China, some with timing of lunar eclipse phase are significant to the study of secular variation and fluctuation of the Earth’s rotation.Among the over 700 observational records for about 400 lunar eclipses,133 observational times of eclipse phases about展开更多
文摘In the study of variation of the earth’s rotation based on the records of some ancientastronomical events, the timing records of ancient astronomical events and phenomena, suchas solar and lunar eclises and lunar occultation, are important components of the data.The reliable records, especially those from the countries and regions with advanced an-cient astronomy and timing technology, contain valuable information on the variation
文摘Although the Japanese records of central or near central solar eclipses (i.e. the total, annular and total-annular eclipses) are not very old, so long as their documents definitely recording the observational place, date and phenomenon of the eclipse or the parameters can be defined through some textual researches even if
文摘In abundant old observational records of lunar eclipses in ancient China, some with timing of lunar eclipse phase are significant to the study of secular variation and fluctuation of the Earth’s rotation.Among the over 700 observational records for about 400 lunar eclipses,133 observational times of eclipse phases about
