Auroral light | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Aurora


00:01:19 1 Etymology
00:01:51 2 Occurrence of terrestrial auroras
00:06:34 2.1 Images
00:09:04 2.2 Visual forms and colors
00:14:24 2.3 Other auroral radiation
00:15:01 2.4 Aurora noise
00:15:35 3 Causes of auroras
00:20:55 3.1 Auroral particles
00:22:32 3.2 Auroras and the atmosphere
00:24:46 3.3 Auroras and the ionosphere
00:26:54 4 Interaction of the solar wind with Earth
00:30:44 4.1 Magnetosphere
00:34:12 5 Auroral particle acceleration
00:39:18 6 Auroral events of historical significance
00:44:53 7 Historical theories, superstition and mythology
00:51:39 8 Non-terrestrial auroras
00:55:21 9 See also



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SUMMARY
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An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis), southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
Auroras are the result of disturbances in the magnetosphere caused by solar wind. These disturbances are regularly strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere).
The resulting ionization and excitation of atmospheric constituents emits light of varying color and complexity. 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. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes.