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Forgetting Politics, military, and the deficit for the moment.
The idea of a permanent moon base as a stepping stone to Mars is not a crazy idea.
Earth's gravity well is many times greater than the moon's. (Isn't the lunar gravity approximately one sixth of the Earth's?)
Liftoff from a moon-based launching station allows a lot less force than an Earth-based launch.
Raw materials may be available on the moon, and a thriving base could conceivably produce the materials needed to construct the rockets used for the missions.
Radiation is always a consideration, but less as a byproduct of our own making, more as a constant presence on the moon itself.
Solar energy could be used much more than Earth could ever generate, since there would be a large area for the panels, and any portion of the moon's surface is subject to solar radiation for roughly two weeks straight at a time. Well placed panel "farms" could conceivably be used for constant energy sources.
Now, back to the original considerations. Can we afford to do this? At this time, no.
Can we get along with the rest of the world to agree to this? Not bloody likely.
Would this have been laughed out of the "serious discussion phase" if it were proposed by a Democratic President? Oh, hell yes!
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