Blue Origin, the space rocket company backed by billionaire Jeff Bezos, is formally challenging the $2.9-billion (roughly Rs. 21,650 crore) Moon lander contract awarded by NASA to rival Elon Musk's SpaceX.
The sought-after project aims to put humans back on the moon for the first time since 1972.
"NASA has executed a flawed acquisition for the Human Landing System programme and moved the goalposts at the last minute", Blue Origin said in an emailed statement.
"Their decision eliminates opportunities for competition, significantly narrows the supply base, and not only delays, but also endangers America's return to the moon. Because of that, we've filed a protest with the GAO."
The filing of the 50-page protest by Blue Origin was reported earlier by the New York Times.
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