NASA will return to the moon by 2020 and build a permanent base by 2024. The base will be at the moon's south pole because it is sunlit three-quarters of the time. Solar energy can be used. The plan is for crews to eventually stay on the moon for periods of 6 months. It will be an international effort, with Europe, Russia and Japan. The mission goal is to set the stage for going to Mars. In 1980, I thought we would be on Mars in my lifetime. It will probably not happen. Space exploration is long term. It involves the whole human species. It may be the 22nd century before men walk on Mars.
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