SPACE PHOTOS THIS WEEK: Giant Star, Mars Aurorae, More

SPACE PHOTOS THIS WEEK: Giant Star, Mars Aurorae, More
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November 21, 2008--Scientists have mapped Mars's aurorae. Such displays of ultraviolet light on Earth are referred to as the northern and southern lights.

Using the European Space Agency's Mars Express, a team of French astronauts has observed nine ultraviolet light shows on Mars, providing it with enough information to make a basic map.

The correlation between the streaks of ultraviolet light, invisible to the human eye, and areas of Mars' atmosphere with electrically charged particles suggest that magnetic fields help produce the aurorae.
—Image by M. Holmstrvm (IRF)/ESA
 
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