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After Pluto, what's next?

After Pluto, what's next?

There is a bittersweet aspect to the New Horizons spacecraft's amazing flyby of Pluto and its moons ("Science advocates hope New Horizons spurs renewed investment in space exploration," July 18). While NASA has plans for future missions to Mars, the Jovian moon Europa and perhaps the Saturnian moon Enceladus, and New Horizons' mission will likely be continued to explore the Kuiper Belt that lies beyond Pluto, this may be the last time for a generation or more that we will see a close-up of a previously unexplored world in our solar system. This doesn't have to be the case, however. The same trans-Neptunian planetoids whose discovery prompted the International...