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The most reasonable date for a Mars mission is 2020. That allows plenty of time for a measured approach and spreads the expenditure over a sensible period. It also gives NASA ample opportunity to choose the next goal after Mars -- exploration of the asteroid belt, for example, or a manned...
Before such a moon base can be built, NASA will have to get some kind of space station: the massive components needed for a lunar habitat are too heavy to lift from earth and will have to be assembled in space. The station will also be needed for assembling a...
The cost of such a multi-step project would be large -- at least $5 billion a year and maybe considerably more. But unlike the $35 billion spent on the shuttle program, the expenditure would produce a return not just in prestige and technological leadership but also in the establishment of...
NASA's budget will have to be raised to pay for such an ambitious program, perhaps even doubled from its current $11 billion a year. That will be hard in an era of budget deficits. But there is support for a Mars mission in both the House and the Senate...
SPACE: America should embark on a mission to Mars