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NASA's Artemis moon rocket cleared for third launch try early Wednesday

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The $4.1 billion booster was approved for an "as is" launch early Wednesday.

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The launch will begin a long-delayed flight to propel an unmanned Orion crew capsule around the Moon and back.

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If more strips of "RTV" insulation break free during the Space Launch System rocket's ascent into space, an engineering analysis has shown that the material is not as massive or dense,

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With the countdown moving into its final hours, NASA's mission

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management team unanimously approved the third launch attempt to be moved to 1:04 a.m. EST Wednesday, opening a two-hour window

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The 322-foot-tall Space Launch System rocket, NASA's most powerful rocket ever,

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But the first SLS to roll off the assembly line has been plagued by hydrogen fuel leaks and other glitches,

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This has interrupted multiple fuel tests and two launch attempts since the vehicle was launched last March to launch pad 39B more than 240 days earlier.

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After coming up with "kinder, gentler" technology to fuel the rocket to minimize any leaks,

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engineers prepared for another launch attempt on November 3,

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