Auroras at Non-Visible Wavelengths

The collisions of trapped charged particles with atmospheric molecules causes spectacular effects in the visible spectrum, but these excited molecules can also emit radiation in other wavelength bands. The following figures show aurora imaged in the ultraviolet (UV) and X-ray regions of the spectrum.

UV emission from northern aurora observed by the Polar satellite (Ref)	X-ray emission from northern aurora observed by the Polar Satellite (Ref)