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has been cited by the following article:

• TITLE: The Sun’s Movement in the Sky Now and in the Past

  AUTHORS: Joseph J. Smulsky

  KEYWORDS: Changing Parameters, Orbit, The Earth’s Axis, Duration, Day, Polar Night, Gnomon

  JOURNAL NAME: Open Access Library Journal, Vol.5 No.4, April 8, 2018

  ABSTRACT: The paper considers the theory of the phenomena associated with the Sun’s passage in the sky when the parameters of the orbital and rotational motion of the Earth are changing. The author found that the obliquity changes from 14.8° to 32.1°. These results explain the variations of paleoclimate and are consistent with several testimonies of paleoastronomy. The program SunPhenomn.mcd developed in MathCad to calculate the duration of solar day, equation of time, daylight, azimuths of the daily movement of the Sun, sunrises and sunsets, the length and azimuth of the gnomon shadow, duration of the polar days and nights, of seasons and other phenomena. The phenomena of the Sun in the contemporary epoch and in 4 extreme epochs in the interval of 50 thousand years ago are calculated. The example of the funnel on Yamal shows the application of the program SunPhenomn.mcd in aerospace studies of the relief. The work is of interest to a wide range of experts in the field of Earth Sciences and can be used by students and post-graduate students to carry out theses and dissertations.