This is what our Sun looks like if photographed in Hydrogen Alpha, at a specific wavelength of 656.28 nm (red colour). The image has then been inverted and falsely coloured. Even though the Sun is quite calm in this image you can see Sun spots (the dark areas) and prominences, plasma rising up high above the Sun’s surface and mostly falling down into the Sun again.

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Sun in Hydrogen Alpha
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Published by Published or last modified on 2014-01-10