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Gordon Docherty's avatar

Interesting article by Ian Sample (Science Editor) from today’s Guardian:

https://www.theguardian.com/science/2026/aug/05/unprecedented-images-may-explain-one-of-greatest-mysteries-of-the-sun

To quote:

“In the latest images, the small whirlpool-like structures on the sun’s surface were identified as signatures of what scientists call Kelvin-Helmholtz instabilities (KHIs). These form when fast-moving plasma slides past slower moving fluid, creating shear at the interface. This sets up small disturbances in the sun’s plasma that grow into spiralling vortices that look like breaking waves.“

Kelvin-Helmholtz instabilities are, apparently, fluid phenomena that arise when there is a velocity shear within a single fluid or across the interface of two fluids with different velocities and densities - so, definitely related to magnetohydrodynamics.

David E. Smith's avatar

I want to know whether the four 'nuclear' power plants opened in the USA in summer 2026 by four different companies are actually some OTHER kind of energy devices.

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