Nasa has launched two spacecraft to the Moon in preparation for a return to the lunar surface by US astronauts.
LRO (Lunar Reconnaissance Orbiter) and a crater observation mission have lifted off from Florida on an Atlas V rocket.
Data gathered by LRO will help mission planners select future landing sites and scout locations for lunar outposts.
The second mission will send a rocket stage crashing into the lunar surface to scour the resulting debris plume for evidence of water ice.
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