New Horizons Spacecraft Now Closer to Pluto Than Earth

The New Horizons spacecraft crossed a milestone boundary today: it is now closer to its primary destination, Pluto, than to Earth. But New Horizons ?the fastest man-made object ? is not yet halfway to the dwarf planet. That won't happen until February 25, 2010. New Horizons is now 1,440 days into its 9.5-year journey and well past 15 AU (astronomical units) from the Sun. But there is a long haul yet to go: there are still 1,928 days until operations begin for the close encounter, and 2022 da [...]

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