The Physical Environment

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aurora




Click image to enlarge

Aurora over the Northern Hemisphere 
as viewed from the Space Shuttle, 1994

Source: NASA
Used with permission

 

An aurora is a glow in a planet's ionosphere caused by the interaction between the planet's magnetic field and charged particles emitted by the Sun.

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© 2003 - 2015 Michael Ritter (tpeauthor@mac.com)
Last Revised September 26, 2006