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SlideshowReport

The Atmosphere of Mars

Description
(a) When Mars’s sky is relatively free of dust, it appears similar in color to our sky,
as shown in this sunset photo taken by the rover Opportunity.
The darker, brown color in which the Sun is immersed is due
to lingering dust in the sky. When less dust is present, the Sun
looks almost white during Martian sunsets. Most of the images
we have of Mars’s sky show colors like that seen in
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