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  2. Jeans instability - Wikipedia

    en.wikipedia.org/wiki/Jeans_instability

    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.

  3. Plasma stability - Wikipedia

    en.wikipedia.org/wiki/Plasma_stability

    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 ...

  4. James Jeans - Wikipedia

    en.wikipedia.org/wiki/James_Jeans

    Sir James Hopwood Jeans OM FRS [1] (11 September 1877 – 16 September 1946 [2]) was an English physicist, mathematician and an astronomer.He served as a secretary of the Royal Society from 1919 to 1929, and was the president of the Royal Astronomical Society from 1925 to 1927, and won its Gold Medal.

  5. Jeans equations - Wikipedia

    en.wikipedia.org/wiki/Jeans_equations

    The Jeans equations are a set of partial differential equations that describe the motion of a collection of stars in a gravitational field. The Jeans equations relate the second-order velocity moments to the density and potential of a stellar system for systems without collision.

  6. Category:Fluid dynamic instabilities - Wikipedia

    en.wikipedia.org/wiki/Category:Fluid_dynamic...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  7. PPTS - Wikipedia

    en.wikipedia.org/wiki/PPTS

    PPTS may refer to: Palestine Pilgrims' Text Society, a Victorian academic society; Pulsed plasma thrusters, a type of spacecraft propulsion; Prospective Piloted ...

  8. A new report says the world faces a 'dangerous decade' as ...

    www.aol.com/news/world-enters-era-increasing...

    The world has entered an era of increasing instability as countries around the globe boost military spending in response to Russia’s invasion of Ukraine, the Hamas attack on Israel and China’s ...

  9. Instability - Wikipedia

    en.wikipedia.org/wiki/Instability

    After the instability has run its course, the system is typically "hotter" (the motions are more random) or rounder than before. Instabilities in stellar systems include: Bar instability of rapidly rotating disks; Jeans instability; Firehose instability [4] Gravothermal instability [5] Radial-orbit instability