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Eratosthenes also calculated the Sun's diameter. According to Macrobius, Eratosthenes made the diameter of the Sun to be about 27 times that of the Earth. [17] The actual figure is approximately 109 times. [26] During his time at the Library of Alexandria, Eratosthenes devised a calendar using his predictions about the ecliptic of the Earth. He ...
Various ancient Greek calendars began in most states of ancient Greece between autumn and winter except for the Attic calendar, which began in summer.. The Greeks, as early as the time of Homer, appear to have been familiar with the division of the year into the twelve lunar months but no intercalary month Embolimos or day is then mentioned, with twelve months of 354 days. [1]
Lichun traditionally signifies the beginning of spring. [ 3 ] [ 4 ] : 32 Chinese New Year is celebrated around this time. Farmers often celebrate the beginning of Lichun with special village events, [ 4 ] : 33–34 worship [ 4 ] : 33–34 and offerings to the Taoist and Buddhist gods and ceremonies for a blissful and prosperous new year.
The Byzantine calendar, also called the Roman calendar, [note 1] the Creation Era of Constantinople or the Era of the World (Ancient Greek: ...
The Ptolemaic system of celestial motion as depicted in the Harmonia Macrocosmica (1661). Science in classical antiquity encompasses inquiries into the workings of the world or universe aimed at both practical goals (e.g., establishing a reliable calendar or determining how to cure a variety of illnesses) as well as more abstract investigations belonging to natural philosophy.
Before the Spring and Autumn period (before 770 BC), the Chinese calendars were solar calendars. [17] In the so-called five-phase calendar, the year consists of 10 months and a transition, each month being 36 days long, and the transitions 5 or 6 days.
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An equatorial ring. An equatorial ring was an astronomical instrument used in the Hellenistic world to determine the exact moment of the spring and autumn equinoxes.Equatorial rings were placed before the temples in Alexandria, in Rhodes, and perhaps in other places, for calendar purposes.