2.3 Colors and wavelengths of auroral light.Most of the planets in the Solar System, some natural satellites, brown dwarfs, and even comets also host auroras. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. The resulting ionization and excitation of atmospheric constituents emit light of varying colour and complexity. These particles, mainly electrons and protons, precipitate into the upper atmosphere ( thermosphere/ exosphere). These disturbances alter the trajectories of charged particles in the magnetospheric plasma.
Major disturbances result from enhancements in the speed of the solar wind from coronal holes and coronal mass ejections. Īuroras are the result of disturbances in the magnetosphere caused by the solar wind. Auroras display dynamic patterns of brilliant lights that appear as curtains, rays, spirals, or dynamic flickers covering the entire sky. Īn aurora (plural: auroras or aurorae ), also commonly known as the polar lights, is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Aurora australis seen from the ISS, 2017.
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