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UltravioletPhotography

10-Year time lapse of the Sun - NASA link


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bobfriedman

I don't know where to put this. but, This 10-year time lapse showcases photos taken at a wavelength of 17.1 nanometers, which is an extreme ultraviolet wavelength that shows the Sun’s outermost atmospheric layer — the corona.

 

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One of the very few images (more like technologies) which can see in the EUV spectrum. As I am aware of, there are no materials in "normal" thicknesses (like 1 mm) that are transparent to EUV light. In other words, you can't build lenses to see there.
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I got a sun filter not too long ago as part of a bulk filter purchase.

I have been meaning to try and image the sun.

Its a fun filter in that it uniformly blocks all wavelengths from UV through IR.

You can see light bulbs filaments with it.

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