Talk:Chronology: Difference between revisions
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23.43695 + 66.33 = 89.76695. Offhand, I can't think of any reason why they shouldn't add up to 90. Maybe they're from sources with different dates, as the inclination does vary slightly over time. [[User:Peter Jackson|Peter Jackson]] ([[User talk:Peter Jackson|talk]]) 17:04, 10 October 2019 (UTC) | 23.43695 + 66.33 = 89.76695. Offhand, I can't think of any reason why they shouldn't add up to 90. Maybe they're from sources with different dates, as the inclination does vary slightly over time. [[User:Peter Jackson|Peter Jackson]] ([[User talk:Peter Jackson|talk]]) 17:04, 10 October 2019 (UTC) | ||
Egyptian calendar: | |||
#I think, without checking right now, that Censorinus' calculations were out by 4 years | |||
#1460 years before 139 is 1322, not 1321 | |||
#all these calculations are based on the Julian year, not the astronomical year | |||
#heliacal rising of Sothis occurs on a particular day 4 years running; what basis could we have for choosing 1 in particular? | |||
#what basis could we have for saying the calendar was originally supposed to start at that time, rather than this being a later idea? | |||
[[User:Peter Jackson|Peter Jackson]] ([[User talk:Peter Jackson|talk]]) 17:12, 10 October 2019 (UTC) | |||
Revision as of 11:12, 10 October 2019
BCE/CE section uses these terms before explaining them. Peter Jackson (talk) 16:57, 10 October 2019 (UTC)
23.43695 + 66.33 = 89.76695. Offhand, I can't think of any reason why they shouldn't add up to 90. Maybe they're from sources with different dates, as the inclination does vary slightly over time. Peter Jackson (talk) 17:04, 10 October 2019 (UTC)
Egyptian calendar:
- I think, without checking right now, that Censorinus' calculations were out by 4 years
- 1460 years before 139 is 1322, not 1321
- all these calculations are based on the Julian year, not the astronomical year
- heliacal rising of Sothis occurs on a particular day 4 years running; what basis could we have for choosing 1 in particular?
- what basis could we have for saying the calendar was originally supposed to start at that time, rather than this being a later idea?
Peter Jackson (talk) 17:12, 10 October 2019 (UTC)