CSIR (Council of Scientific & Industrial Research) Earth Sciences The Earth and the Solar System-Milky Way and the Solar System Study Material (Page 10 of 13)
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Origin and Evolution of Planets and Earth: Steady State Theory, Electromagnetic Theory of Hannas Alfven
Steady State Theory
Main rival to Big Bang Theory is Steady State Theory (Bondi, Gold, and Hoyle) . Important postulates are:
- It asserts that despite universe is expanding; it does not change its appearance with time.
- It suggests that universe as a whole had no defini…
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Origin and Evolution of Planets and Earth: Dust Gas Cloud Theory of Weizsacker, Other Theories
Dust Gas Cloud Theory of Weizsacker
German physicist Carl Von Weizsacker showed in 1943, that all the old objections against Kant-Laplace hypothesis could be easily removed using the new knowledge about the chemical composition of the cosmic matter. It shows that the chemical composition of Earth was different from that of the stellar bodies. Proportion of light gases like helium and hydrogen is very small in earth. On the other hand, Sun was composed mostly of hydrogen and helium, and ha…
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