* Astronomy

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RE: Gravity Recovery and Interior Laboratory mission

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Launch moved to the second launch window at 13:16:12 GMT

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Red upper level winds

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GRAIL Launch Coverage: Intro to commentary

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All systems are go, weather is go

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T minus 4 minutes and holding

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T minus 30 minutes

Now live on Nasa TV

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T minus 45 minutes

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GRAIL's launch period opens Sept. 8 and extends through Oct. 19. On each day, there are two separate instantaneous launch opportunities separated in time by approximately 39 minutes. On Sept. 8, the first launch opportunity is at 8:37 a.m. EDT (5:37 a.m. PDT). The second launch opportunity is 9:16 a.m. EDT (6:16 a.m. PDT).

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GRAIL Launch Set for Sept. 8

With the launch of the GRAIL mission less than two days away, project scientists and engineers hold a pre-launch news conference at NASA's Kennedy Space Centre.

Ed ~ the two launch opportunities are at: 12:37:06 and 13:16:12 GMT, 8th September, 2011.