In Pictures: NASA’s coolest 'way-out' future projects

From space submarines to solar wind powered spacecraft, a look at the coolest space technologies

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Johns Hopkins University developed a method for distinguishing the gravity fields and sub-surface mass distribution of a solar system small body, without requiring dedicated orbiters or landers. Instead of a lander, a spacecraft releases a swarm of small, low-cost probes during a flyby past an asteroid or comet. By tracking those probes, we can estimate the asteroid’s gravity field and infer its underlying composition and structure.

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In Pictures: NASA’s coolest 'way-out' future projects

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