Picture of the Day: NASA's GRAIL Gets Ready to Launch

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NASA's Gravity Recovery and Interior Laboratory (GRAIL) is scheduled to launch tomorrow morning. The twin spacecraft that make up GRAIL were originally slated to take off on Thursday, but high winds and an issue with the rocket's propulsion system have combined to create a two-day delay. GRAIL is scheduled to arrive at the moon on New Year's Eve (GRAIL-A) and New Year's Day (GRAIL-B). The mission will help scientists study the moon's interior structure and thermal history.

Image: NASA.
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Rebecca J. Rosen is a senior editor at The Atlantic, where she oversees the Business Channel. She was previously an associate editor at The Wilson Quarterly.

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