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Where is zero degrees longitude on Mars?

19 August 2004

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The 0.5-kilometre-wide crater, subsequently named 'Airy-0' (within the larger crater Airy), chosen as the zero degrees longitude point. Here the outlines of the Mariner 9, Viking and Mars Global Surveyor images are shown on a wide-angle context image taken by the US Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC).

Credits: NASA/JPL/MSSS

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