NASA Mars Exploration Rover Opportunity (MER-B) nasa-mars-exploration-rover-opportunity-mer-b NASA's Mars Exploration Rover Opportunity, or MER-B — the solar-powered rover that landed on Mars in January 2004 and operated for nearly 15 years, far outlasting its 90-day mission.
nasa nasa mars mars opportunity-rover opportunity-rover mer-b mer-b space space exploration exploration science science engineering engineering jpl jpl spacecraft spacecraft
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