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8 mysterious images of Mars

By: Katherine Butler on Oct. 11, 2010, 11:55 a.m.
sunset over flat Martian landscape

Photo: NASA/JPL/Texas A&M/Cornell

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The rover Spirit caught this sunset on May 19, 2005, on the 489th Martian day of the rover's journey. The photo captures the Gusev crater on Mars. The planet typically experiences a long twilight for up to two hours after sunset because of an abundance of dust scattered across the night sky that reflects sunlight.