Five Years on Mars

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OverviewOverviewVideoVideoPhotosPhotosInteractiveInteractiveVote!Vote!Rover ModelRover ModelMars PanoramaMars Panorama

Meet the Mars Exploration Rover

Twin rovers Spirit and Opportunity are based on the Mars Exploration Rover platform.
Each rover is a mobile geological laboratory — a robot geologist — loaded with instruments designed for up-close study of the Red Planet's rocks.

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Mars Exploration Rover By the Numbers

Rover Dimensions:
4.9 feet high
7.5 feet wide
5.2 feet long

Rover Weight:
384 lbs.

Power:
140 watts from solar panel array and lithium-ion battery system.

Science Instruments:
Panoramic cameras, miniature thermal emission spectrometer, Mössbauer spectrometer, alpha particle X-ray spectrometer, microscopic imager, rock abrasion tool, and magnet arrays.

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