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Definition of Mariner from the Oxford Advanced Learner's Dictionary

 

Mariner

 
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the name of a series of flights of NASA spacecraft that went past or around other planets. Mariner 1 failed and was destroyed in flight in 1962, but in the same year Mariner 2 flew past Venus. Mariner 9 went into orbit (= a circular path in space) around the planet Mars in 1971 and took more than 7 000 photographs. Mariner 10 flew past Venus and Mercury in 1974 and again in 1975.

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