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Message Subject SOLAR WATCH * Huge X8.2 Flare Sept. 10, 2017! (Updated Daily)
Poster Handle Simple27
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FLAMING WALL OF PLASMA: If you have a solar telescope, point it at the northwestern limb of the sun. A giant flame-shaped wall of plasma is flickering against the black of space.

Martin Wise of Trenton, Florida, photographed the structure on June 2nd: [link to spaceweathergallery.com]

"It's not as grand as it was two days ago," notes Wise, "but it is still large and bright."

How large is it? The tip of the "flame" is twice as tall as the entire planet Earth--dimensions that make it an easy target for safely-filtered backyard optics.

Contrary to appearances, this prominence is not on fire. Unlike the wick of a burning candle, where oxygen is combined with hydrocarbons to produce light and heat, no combustion takes place inside a solar prominence. Hydrogen-filled prominences glow simply because they are hot (like a stovetop glows red when it gets very hot) and they flicker because their inner magnetic fields are not quite stable.

[link to spaceweather.com]
 
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