"The X-ray spectrum of the loop is extraordinary, " said Dr Masaaki Sakano of the University of Leicester.
BBC: Arches Cluster, Leicester
Only instead of amplifying visible light, it amplifies photons in the X-ray spectrum.
FORBES: Scientists Build The World's Most Powerful Laser
When the sun is in this state, it also sends less energy out in the soft X-ray and extreme ultraviolet parts of its spectrum.
MSN: Earth's upper atmosphere cooling dramatically
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