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वेदों की प्राचीनता एवं काल-निर्णय / ओरायन (लोकमान्य बाल गंगाधर तिलक - खगोलीय वैदिक शोध)

वेदों की प्राचीनता एवं काल-निर्णय / ओरायन (लोकमान्य बाल गंगाधर तिलक - खगोलीय वैदिक शोध)

The Orion and The Arctic Home in the Vedas by Lokmanya Tilak

लोकमान्य बाल गंगाधर तिलक द्वारा

DevanagariHindipublished548 पृष्ठ

पृष्ठ 63, कुल 548 में से

संदर्भ में पढ़ें
पृष्ठ 63
  1. THE ARCTIC HOME IN THE VEDAS.
    during winter, whatever the eccentricity of the earth
    may be. But though these figures are not affected by
    the eccentricity of the orbit, yet we have seen that the
    duration of the summer or winter does vary as the eccentricity.
    Supposing, therefore, that we have the longest winter in the
    northern hemisphere, we shall have to distribute 229 heat-units
    over 166 days of a short summer, and 136 heat-units over 199
    days of a long winter of the same period. In other words, the
    difference between the daily average heat in summer and winter
    will, in such a case, be the greatest, producing shorter but warmer
    summers and longer and colder winters; and ice and snow
    accumulated in the long winter will not be melted or removed
    by the heat of the sun in the short summer, giving rise, thereby,
    to what is known as the Glacial period in the northern hemisphere.
    From what has been stated above, it may be seen that the southern
    hemisphere during this period will have long and cool summers
    and short and warm winters, a condition precisely reverse to that
    in the northern hemisphere. In short the Glacial and Inter-
    Glacial periods in the two hemispheres will alternate with each
    other every 10,500 years, if the eccentricity of the earth be suffi-
    ciently great to make a perceptibly large difference between the
    winters and the summers in each hemisphere.
    If Dr. Croll had gone only so far, his position would have
    been unassailable, for the cause, enumerated above, is sufficiently
    potent to produce the climatic changes attributed to it. At any
    rate, if this was not the sole cause of a succession of Glacial and
    Inter-Glacial periods, there could be no doubt that it must have
    been an important contributory cause in bringing about these
    changes. But taking the value of the eccentricity of the earth's
    orbit from the tables of Leverrier, Dr. Croll calculated that during
    the last three million years there were three periods of maximum
    eccentricity; the first of 170,000, the second of 260,000, and the third