What is the difference between aurorae and electroglow?
Aurorae are caused by charged particles (usually electrons) being drawn into the polar atmosphere by the planet's magnetic field.
Airglow is caused by just photons interacting with the atmosphere.
Electroglow requires both electrons and photons.
Source: The Free Library  (article is under express copyright, see the paragraph that starts &quot;Voyager 2&quot;)