Pearl jewelry for bridal and wedding tradition, bridal pearl necklace set for wedding ceremony, pearl jewelry for graduation and wedding celebration
Before we begin to look for the explanation of these phenomena, take a look atvarious secondary reasons for the breaks in the geologicalthe sequence of organic forms. We'll start with a more General, changingclimate, and through climate change and the distribution of organic life.Among these reasons, you can specify one, which, as we know,but mentioned none of the writing about this subject. The reason for this isknown to slow the astronomical rhythm, as a result of which the Northern andThe southern hemisphere is alternately exposed to high temperature extremes.Due to the weak ellipticity of earth's orbit Earth's distance from the Sunchanges of approximately 3 000 000 miles. Currently aphelionconsistent with our Northern summer, and the perihelion summer of the southern hemisphere. Butdue to the slow movement of the earth's axis which produces the precessionof the equinoxes, over time the opposite should happen: the Earth willjust closer to the Sun during summer in the Northern hemisphere and all further fromit during summer of the southern hemisphere, or during the Northern winter. Periodnecessary for the completion of slow motion, which determinesthese changes, is approximately 26,000 years; and if it were notanother process, modifying the first, both hemispheres are alternatelywould this match your summer with the least distance of the Earth fromThe sun at the end of the period, which lasts 13,000 years. But the fact thatat the same time is still slower change in the direction of bigthe axis of earth's orbit, resulting in the above changesalternately in both hemispheres, completes its cycle in approximately 21 000years. In other words, if in the time of greatest closeness of the Earth to the Suncoincides with the middle of our summer, and the greatest distance from the Sun - withthe middle of our winter, then after 10 500 years the Earth will be just further from the Sunin the middle of our summer and is closest to him in the middle of our winter. The differencethe distance of the Earth from the Sun in the two limiting positions of these alternatechanges is one-thirtieth share; therefore, the difference betweenthe amount of heat received from the Sun on a summer day in thesethe opposite conditions, comes to one-fifteenth. Applying those changesnot to zero of our thermometer, and the temperature of the celestial spaces, sirJohn Herschel calculates that "23o Fahrenheit make the smallest changetemperature under such conditions that can be reasonably attributedexisting changes in distance from the Sun." So each hemispherehas the era in which the short and hot summers should bea long and very cold winter.
Post a Comment