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The Jeans mass is named after the British physicist Sir James Jeans, who considered the process of gravitational collapse within a gaseous cloud. He was able to show that, under appropriate conditions, a cloud, or part of one, would become unstable and begin to collapse when it lacked sufficient gaseous pressure support to balance the force of gravity.
Jeans married twice, first to the American poet Charlotte Tiffany Mitchell in 1907, who died, [14] and then to the Austrian organist and harpsichordist Suzanne Hock (better known as Susi Jeans) in 1935. Susi and Jeans had three children: George, Christopher, and Catherine. [15] As a birthday present for his wife, he wrote the book Science and ...
The Mysterious Universe is a popular science book by the British astrophysicist Sir James Jeans, first published in 1930 by the Cambridge University Press. In the United States, it was published by Macmillan. The book is an expanded version of the Rede Lecture delivered at the University of Cambridge in 1930. [1]
Firehose instability (a.k.a. hose instability), not to be confused with the similarly named Firehose instability in galactic dynamics; Fish instability, Free electron maser instability, Gyrotron instability, Helical (Helix) instability, Jeans instability, [23] [24] Magnetic buoyancy instability. Interchange instability (a.k.a. flute instability ...
Jeans Equation simulations place limits on the size of this halo. An example of such an analysis is given by the constraints that can be placed on the dark matter halo within the Milky Way. Using Sloan Digital Sky Survey measurements of our Galaxy, researchers were able to simulate the dark matter halo distribution using Jeans equations. [8]
As the Jeans Instability is the more general page, it should be kept. But I think it should be merged carefully as there's a lot of good stuff in the Jeans mass which needs to come over. -- H2g2bob 17:19, 5 June 2006 (UTC) [ reply ]
In organic synthesis, PPTS is used as a weakly acidic catalyst, providing an organic soluble source of pyridinium (C 5 H 5 NH +) ions.For example, PPTS is used to deprotect silyl ethers or tetrahydropyranyl ethers when a substrate is unstable to stronger acid catalysts.
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