FACTOID # 79: Australians are the most likely to join charities, educational organizations, environmental groups, professional organizations, sports groups and unions. But only three percent join political parties.
 
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Encyclopedia > Mean longitude

In astrodynamics or celestial dynamics mean longitude of an orbiting body is ..


Calculation

In astrodynamics mean longitude can be calculated as follows:

where:


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History & info - the Chinese calendar (2102 words)
This means that principles of modern science have had an impact on the Chinese calendar.
This means that the year wu-yin, the 15th year in the 78th cycle, started on 28 Jan 1998.
Inequalities in the Moon's motions were incorporated as early as the seventh century C.E., but the Sun's mean longitude was used for calculating the solar terms until 1644.
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