Opportunity of a lifetime—NASA's 4,000 days roving Mars

Christian Schroeder, The Conversation

The rover that could, and still is, running scientific marathons on Mars. Credit: NASA/JPL-Caltech/Cornell/USGS/ASU From 20-metre-wide Eagle crater via the 150-metre Endurance crater and 800-metre Victoria crater eventually to the 22km-wide Endeavour crater: with each successive crater the next seemed always beyond reach – or so it seemed to us, so far away. Between craters, Opportunity could investigate rock fragments that had landed on top of the sand sheet and in doing so discovered meteorites among the rubble. Credit: NASA/JPL-Caltech/Cornell/USGS/ASU Danger everywhere There were occasions where it was touch and go whether Opportunity would be able to continue its journey. Credit: NASA/JPL-Caltech/Cornell/ASU So, how did Opportunity celebrate its 4,000 days?

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