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NASA's New Horizons spacecraft zooms in on Pluto
NASA's New Horizons spacecraft zooms in on Pluto

Pluto, get ready for your close-up. After traveling nine years across more than 3 billion miles of space, a spacecraft the size of a grand piano is about to give humanity its first high-resolution view of the dwarf planet that's about two-thirds the size of our moon. Nobody knows what the rendezvous will reveal. Pluto's icy surface may resemble an extreme version of Antarctica, with snow-capped mountains, steep crevasses and towering ice cliffs. The planet could be surrounded by rings of tiny ice particles, like its giant neighbor Neptune. There may even be evidence that an ancient ocean once sloshed beneath the frozen crust of its largest moon, Charon. When it comes to...

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