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  • Planetary Scientists Propose Swarms of Penetrator Probes
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    Planetary Scientists Propose Swarms of Penetrator Probes

    NEW YORK — Touching down on an alien surface typically requires a delicate landing approach that evokes the graceful spacecraft ballet of “2001: A Space Odyssey,” or at least some cushioning airbags. But several proposed future missions could take a more crude approach by firing swarms of cheap, bullet-shaped penetrator probes at planets.


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