Earth rotation Julian Gregorian styles | |
The time and the calendar
Время и календарь …Люди научились точно учитывать время, когда развилась астрономия — наука о небесных светилах. Только благодаря астрономии мы умеем точно ответить на вопросы: «который час?», «какое сегодня число?», так как эта наука дала правила выверки часов и правила счета дней и годов, то есть то, что называется календарем. Объяснению этих правил и посвящена предлагаемая брошюра. |
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Book condition is Good, no torn or missing pages.
There are some spots, scratches on the cover. Please see photo for more details. |
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A nice addition to any collection!
I have a many other interesting things. Please check out my other items - I'll gladly combine shipping! |
Payment
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