vernal equinox
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2021 ◽  
Vol 969 (3) ◽  
pp. 54-64
Author(s):  
S.A. Tolchelnikova

The author of “The Catalog of Zodiac signs and stars” published in De Revolutionibus, was Ptolemy. Copernicus used this catalog and all available observations of the Sun, Moon and planets, for improvement of the theory and tables of their motions. E. P. Fedorov wants to support with the authoritative opinion of Copernicus the idea of replacing the main optic reference frame to radio system JCRF. Having mastered the experience of previous generations Copernicus knew that the principles of establishing coordinate systems do not change along with opinions on the structure of the universe. Had the places of stars in catalogs not been dependent on the location of the Sun, Copernicus would have had no opportunity to prepare the time and coordinate systems required for solution of his problem. In his manuscript he preserved the idea the principles of compiling star catalogs, which were not included in the published edition along with excerpts from the originally conceived chapters. The words irrefutably prove that the idea of establishing the main reference system from VLBJ observations without the place of vernal equinox could not be supported by reference to Copernicus`s opinion.


Author(s):  
Vitaliy G. Rodionov

The process of mass Christianization and the use of the official language and the Julian calendar in the administrative offices of local authorities influenced heavily the traditional calendar of the Chuvash people. First of all, the names that denoted the months of the transition period, as well as the name of the main Chuvash rite at the vernal equinox – Kalam, were subjected to semantic transformation. Prior to mass Christianization of the Chuvash people, their calendar year began with the month of norăs / nurăs. This term, along with the concept of a 5-day week, was borrowed from the neighboring Iranian language no later than the 4th–8th centuries AD. Before this period the ancestors of the Onoğurs-Bulgar could name the first month of the year as having the meaning «head month [of the year]» and have, like all Proto-Turkic, a 3-day week. The latter is well reflected in the rules for dividing individual parts of moon phases in the Onoğuro-Bulgar calendar, as well as in a 9-day division of moon phases in the calendars of the Chuvash, the Tuvinians and some other Turkic peoples. Number 9 expresses the main idea of the harmonious unity of the three forces of the universe: the Sky (the Sun), the Man from the middle world and the Earth, where the remnants of his ancestors are. The chronotope of Kalam ritual complex reflects the universal idea of «dying «and «resurrecting» nature. The complex was formed on the basis of the ancient cult of the Sun among the proto-Turks, who associated the year (in the meaning of a «warm season») only with the summer sun. With the development of cattle breeding and the emergence of the concept of a two-season (summer and winter) calendar year, the idea of its beginning also changed. The Chuvash, like other Turkic peoples, divided the months into two groups: summer months and winter ones. Later on, the ancient Turks began to mark transition periods from one season to another. The ancient Turks understood summer and winter as the time of heat and frost «birth and death». Sĕren rite, which originally symbolized treating and seeing off the ancestral spirits, gradually transformed into the agricultural festivals Akatui (sĕren) and Sabantui «plow wedding».


2020 ◽  
Vol 9 (3) ◽  
pp. 44-48
Author(s):  
Aleksandr V. Dimitriev ◽  
Minazim M. Rahmatullin

The paper presents the history of discovery and distribution of Iris aphilla L., listed in the Red Book of the Russian Federation (status 2 category) in the Batyrevsky area of the State Nature Reserve Prisursky. It has been reported that the steppe biogeocoenosis, which was severely beaten out by cattle, is being reanimated and restored after 35 years after the establishment of the reserve regime. The results of phenological observations of the beginning of blooming of I. aphilla L. from 2004 to the present time (n = 17) are summarized. According to observations from 2004 to 2020, the early dates of the blooming phase of I. aphilla L. in the Batyrevsky population were noted in 2009, 2010, 2016 (May 14), 2019 (May 12), 2020 (May 10), and later in 2017 (May 23), 2011 (May 26), 2004 (May 28). The average date when the phenophase blooms is on May 1718 (or 5659 days from the vernal equinox). The influence of abnormally cold weather in the pre-winter period 20092010 on the population of I. aphilla L. has been analyzed. The results of this analysis suggest that the ecological scale of D.N. Tsyganov for this species should be extended by the parameter of cryothermal resistance from Cr 712 to Cr 112 for the northernmost Batyrevskaya population of the specified iris.


2019 ◽  
Vol 2 (3) ◽  

Debris streams of exploding stars produce hotspots on Earth’s surface. These hotspots have maximum energy near the time of initial impact with the surface of the Earth and this higher energy has been recorded by space satellites. The incoming stream of positive particles reacts with Earth’s magnetic field that produces a magnetic bottle. As the Earth revolves in its orbit, the Earth tilt causes the incoming streams velocity vector to move across the Earth’s vernal equinox so that where the stream touches the surface is in different hemispheres. The incoming new impact streams can merge causing more energy to be delivered to a particular area and produce extreme weather events like the warm Alaskan winters of 2017-18 and 2018-19. The figures presented of these phenomena are more direct proof of the SNIT theory. The data are available to determine exploding star strike frequency. It is possible to identify an exploding star by knowing its declination and using the time the storm switches hemisphere locations. China’s dust problem can be avoided.


2019 ◽  
Vol 945 (3) ◽  
pp. 37-47
Author(s):  
S.A. Tolchelnikova

The Copernican catalog differs from the catalogs of previous epochs by transferring the reference point of ecliptic longitudes from the vernal equinox to the star γ Aries. This violation of the tradition which did not influence the catalogs of subsequent epochs, is regarded by N. I. Idelson as an anachronism, and in the opinion of E. P. Fedorov, this idea of Copernicus was ahead of time. Since the contradictions in the evaluation of Copernicus’ works are inherent in the literature of the 20th century, it is necessary to recall the pre-Copernican astronomy and refer to the text of his works. Our study consists of three parts (papers). The first one is devoted to the period from the studying the motion of heavenly bodies upon celestial sphere to passing to the World structure and the movements of the Solar system bodies. Copernicus’s heliocentric theory made invaluable contribution into the solution of this problem, impossible without determining the distances. The previous basis of astronomical observations was increased by 20 thousand times. A similar advance in the determination of distances by a mathematically exact method is hardly possible in the foreseeable future.


2019 ◽  
Vol 118 ◽  
pp. 03041
Author(s):  
Jun Ma ◽  
Chenglong Wang ◽  
Yangjun Xia

Shading and blocking problem is the main element restricting efficiency of a LFR system. The traditional analysis methods often need to build the models by using SolTrace, which results in the low efficiency. According to characteristics of single axis tracking of the LFR field, a plane right-angle coordinate system was established, and coordinate equations of reflectors at any time were deduced. Lengths of shading and blocking were got by tracking sun rays which fell on the reflectors and reflected the receiver passing through the adjacent reflector endpoints at any time. Offset caused by the solar azimuth in the shading and blocking area was got by geometrical optics. And then, the shading and blocking efficiency could be calculated. For the Puerto Errado 1 solar thermal plant, the shading and blocking efficiencies on vernal equinox hardly changed; on summer solstice, they were smaller at sunrise and sunset, and gradually stable and close to the value of spring equinox with the increase of solar altitude angle; they were smaller on winter solstice and the change with time were larger. The results of the calculations were good agreement with the simulation dates of SolTrace, and validity of the method was proved.


2017 ◽  
Vol 17 (24) ◽  
pp. 14887-14904 ◽  
Author(s):  
Werner Eugster ◽  
Carmen Emmel ◽  
Sebastian Wolf ◽  
Nina Buchmann ◽  
Joseph P. McFadden ◽  
...  

Abstract. The vernal equinox total solar eclipse of 20 March 2015 produced a maximum occultation of 65.8–70.1 % over Switzerland during the morning hours (09:22 to 11:48 CET). Skies were generally clear over the Swiss Alps due to a persistent high-pressure band between the UK and Russia associated with a rather weak pressure gradient over the continent. To assess the effects of penumbral shading on near-surface meteorology across Switzerland, air temperature data measured at 10 min intervals at 184 MeteoSwiss weather stations were used. Wind speed and direction data were available from 165 of these stations. Additionally, six Swiss FluxNet eddy covariance flux (ECF) sites provided turbulent measurements at 20 Hz resolution. During maximum occultation, the temperature drop was up to 5.8 K at a mountain site where cold air can pool in a topographic depression. The bootstrapped average of the maximum temperature drops of all 184 MeteoSwiss sites during the solar eclipse was 1.51 ± 0.02 K (mean ± SE). A detailed comparison with literature values since 1834 showed a temperature decrease of 2.6 ± 1.7 K (average of all reports), with extreme values up to 11 K. On fair weather days under weak larger-scale pressure gradients, local thermo-topographic wind systems develop that are driven by small-scale pressure and temperature gradients. At one ECF site, the penumbral shading delayed the morning transition from down-valley to up-valley wind conditions. At another site, it prevented this transition from occurring at all. Data from the 165 MeteoSwiss sites measuring wind direction did not show a consistent pattern of wind direction response to the passing of the penumbral shadow. These results suggest that the local topographic setting had an important influence on the temperature drop and the wind flow patterns during the eclipse. A significant cyclonic effect of the passing penumbral shadow was found in the elevation range ≈ 1700–2700 m a. s. l., but not at lower elevations of the Swiss Plateau. This contrasts with an earlier theory that the anticyclonic outflow should reach as far as ≈ 2400 km from the center of the eclipse, which would have included all of Switzerland during the 2015 eclipse. Thus, measurable effects of penumbral shading on the local wind system could be even found at ≈ 2000 km from the path of the eclipse (that is, Switzerland during the 2015 eclipse), and our results tend to lend support to a newer theory that the anticyclonic cold-air outflow from the center of the eclipse only extends ≈ 1600 km outwards, with cyclonic flow beyond that distance.


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