"Mars' Orbital eccentricity over time" | "Transits of Earth as seen from Mars" |
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"NASA makes last-ditch attempt to revive dormant Mars rover Opportunity" | Beutel, Allard November 19, 2011 |
National Aeronautics and Space Administration, , Page 8.
2David, Leonard June 13, 2013 | "Mars: The Planet that Lost an Ocean's Worth of Water" |
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de Groot, Jan Jakob Maria 1912 | "Multiple Asteroid Strikes May Have Killed Mars's Magnetic Field" |
Tesla, Nikola February 9, 1901.
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