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Exploring the solar system's frigid edge

The faint, distant objects of the Kuiper Belt hide secrets as to how the solar system formed.
New Horizons path to Pluto
New Horizons' path to Pluto.
Astronomy: Kellie Jaeger
The New Horizons spacecraft is making a beeline toward distant Pluto. In 2010, it passes the halfway point to its prime destination — twice, in fact. On February 25, it reached the midpoint in distance traveled; on October 16, it will have been in space for half the time it will take to get to Pluto.

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