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Pearl Necklace | Pearl Jewelry: Noir and Piece: Mix a Little Black Dress with Stat...: Noir and Piece: Mix a Little Black Dress with Statement ... Boston magazine's Boston Daily (blog) - Oct. 31, 2013 Add a stunning...
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Before we begin to look for the explanation of these phenomena, take a look at
various secondary reasons for the breaks in the geological
the sequence of organic forms. We'll start with a more General, changing
climate, 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 is
known to slow the astronomical rhythm, as a result of which the Northern and
The southern hemisphere is alternately exposed to high temperature extremes.
Due to the weak ellipticity of earth's orbit Earth's distance from the Sun
changes of approximately 3 000 000 miles. Currently aphelion
consistent with our Northern summer, and the perihelion summer of the southern hemisphere. But
due to the slow movement of the earth's axis which produces the precession
of the equinoxes, over time the opposite should happen: the Earth will
just closer to the Sun during summer in the Northern hemisphere and all further from
it during summer of the southern hemisphere, or during the Northern winter. Period
necessary for the completion of slow motion, which determines
these changes, is approximately 26,000 years; and if it were not
another process, modifying the first, both hemispheres are alternately
would this match your summer with the least distance of the Earth from
The sun at the end of the period, which lasts 13,000 years. But the fact that
at the same time is still slower change in the direction of big
the axis of earth's orbit, resulting in the above changes
alternately in both hemispheres, completes its cycle in approximately 21 000
years. In other words, if in the time of greatest closeness of the Earth to the Sun
coincides with the middle of our summer, and the greatest distance from the Sun - with
the middle of our winter, then after 10 500 years the Earth will be just further from the Sun
in the middle of our summer and is closest to him in the middle of our winter. The difference
the distance of the Earth from the Sun in the two limiting positions of these alternate
changes is one-thirtieth share; therefore, the difference between
the amount of heat received from the Sun on a summer day in these
the opposite conditions, comes to one-fifteenth. Applying those changes
not to zero of our thermometer, and the temperature of the celestial spaces, sir
John Herschel calculates that "23o Fahrenheit make the smallest change
temperature under such conditions that can be reasonably attributed
existing changes in distance from the Sun." So each hemisphere
has the era in which the short and hot summers should be
a long and very cold winter.
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