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Valles Marineris

[ val-uhs-mar-uh-nair-is ]
/ ˈvæl əsˌmær əˈnɛər ɪs /
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noun Astronomy.
a canyon on Mars, 3,100 miles (5,000 km) in length, named after the Mariner spacecraft.
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Question 1 of 6
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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