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  • Change of seasons

    Equinoxes and solstices. Rotating around its axis, the Earth at the same time at a speed of 30 km / s moves around the Sun. In this case, the imaginary axis of the daily rotation of the planet doe...

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  • Graffiti of the Kiev Sophia

    It's hard to say with certainty when calendar calculations on fingers were started in Russia, as described above. The Mongol invasion led to the destruction of many cultural monuments. .. Therefo...

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  • The oldest observatories?

    The peoples who once inhabited the territory of Western Europe did not build pyramids. But in a number of cases they left behind themselves monuments, which cause no less surprise. We are talking...

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  • Calendars of the peoples of the two rivers

    More than 5000 years ago in the south of the wide Mesopotamian plain, where the mighty Tigris and Euphrates rivers bear their full waters, several Sumer city-states appeared. This people not o...

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  • Lunar-solar calendar

    Theory. Two astronomical values ​​are based on the theory of lunar-solar calendars: 1 tropical year = 365.242 20 days, 1 synodic month = 29,530 59 days. Hence we get: 1 tropical ye...

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  • Question about the beginning of the year

    As a result of a careful analysis of the chronicles, it was concluded that the New Year began in Russia with the advent of a new moon in the first spring days close to the spring equinox, when th...

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  • Introduction of the "new style" in the calendar

    Reasons for the calendar reform. At the end of the III century.n.e. The vernal equinox was on March 21.Apparently, the "fathers of the church" who participated in the work of the Council of Ni...

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  • History of the European calendar

    Describing all the complexities of the Jewish calendar, the outstanding Khorezm scholar Biruni( 973- 1048) exclaimed: "But this is only a net and networks that the priests arranged to catch ordin...

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  • Calendar and pyramids

    Many pages are written about the ancient Egyptian pyramids. Great attention was paid to studying their orientation to the sides of the world. It turned out that the pyramids in Giza are oriented ...

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  • "The number of gods"

    Distribution by the number of months. As early as IV in the n. In Alexandria, apparently, from the fascination with astrology, the seven letters of the Greek alphabet A, B, D, , , E.Z, H wer...

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  • The Athens calendar

    "This man has achieved the truth with regard to the prediction of the phenomena of the starry sky, for the motions of the stars and the changes in the weather are completely consistent with his d...

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  • When does the day begin?

    Day. Rhythmic change of day and night. .. The unique beauty of these phenomena is equally impressive for a person both in childhood and in old age. Can not it worry, for example, the summer su...

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  • Calendar of the ancient Greeks

    Years: Star BC.e.(-) Evening Morning Evening Morning and n. Sunset Sunrise Sun...

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  • Elements of spherical astronomy

    Consider astronomical units of time counting, which have become prototypes of calendar units. Then how in the distant past people, even without knowing the true duration of the year, could measur...

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  • The phase change of the moon

    Probably the first of the astronomical phenomena, which primitive man drew attention to, was the phase change of the Moon .She even allowed him to learn how to keep track of the day. And it is n...

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  • What is a calendar

    It is customary to call a calendar system a long time frame with subdivisions into separate shorter periods( years, months, weeks, days).The very word "calendar" came from the Latin words "salo" ...

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  • Alexandria Calendar

    The Alexandrian calendar. After in 30 BC.e. Egypt was conquered by the Romans, here in 26 BC.e.the reform of the calendar was carried out - an Alexandrian permanent year was introduced, in which ...

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  • Calendars of ancient people

    As a result of archaeological research conducted in various parts of the globe, it was established that ancient people used for calendar calculations such unremarkable objects as pieces of mammot...

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