SPIRAL LIGHTS ON MARS: NASA's MAVEN spacecraft has discovered a vast spiral of ultraviolet light swirling over the South Pole of Mars. A new paper just published in JGR Space Physics explains the chemistry of the aurora-like glow, but not its shape. Researchers say the spiral is a mystery. Get the full story on today's edition of Spaceweather.com.
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Above: Shown in false-color (green), ultraviolet light is spiraling around Mars' South Pole. Credit: NASA/MAVEN/LASP
