Our Sun: Three Different Wavelengths

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Our Sun: Three Different Wavelengths

Post by Dragon on Wed Apr 11, 2018 12:04 pm


Image Credit: NASA/GSFC/Solar Dynamics Observatory

From March 20-23, 2018, NASA's Solar Dynamics Observatory captured three sequences of our Sun in three different extreme ultraviolet wavelengths. The resulting images illustrate how different features that appear in one sequence are difficult, if not impossible, to see in the others.

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Re: Our Sun: Three Different Wavelengths

Post by Dragon on Wed Apr 11, 2018 12:06 pm



NASA's Solar Dynamics Observatory ran together three sequences of the sun taken in three different extreme ultraviolet wavelengths to better illustrate how different features that appear in one sequence are difficult if not impossible to see in the others (Mar. 20-21, 2018).

In the red sequence (304 Angstroms), we can see very small spicules and some small prominences at the sun's edge, which are not easy to see in the other two sequences.

In the second clip (193 Angstroms), we can readily observe the large and dark coronal hole, though it is difficult to make out in the others. In the third clip (171 wavelengths), we can see strands of plasma waving above the surface, especially above the one small, but bright, active region near the right edge.

And these are just three of the 10 extreme ultraviolet wavelengths in which SDO images the sun every 12 seconds every day.

 
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Re: Our Sun: Three Different Wavelengths

Post by Dragon on Wed Apr 11, 2018 12:07 pm



The Solar Dynamics Observatory orbits 22,000 miles above the Earth. It images the sun in 10 different wavelengths of ultraviolet light, revealing activity beyond what’s visible to the human eye.

 
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