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<p>into the upper <a href="page.php?w=atmosphere">atmosphere</a> (<a href="page.php?w=thermosphere">thermosphere</a>/<a href="page.php?w=exosphere">exosphere</a>). The resulting <a href="page.php?w=ionization">ionization</a> and <a href="page.php?w=Excitation_%28magnetic%29">excitation</a> of atmospheric constituents emit light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of <a href="page.php?w=acceleration">acceleration</a> imparted to the precipitating</p><p>
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