Pluto - the solar system's loneliest dwarf planet - is getting a friend. NASA's New Horizons probe is on track to meet up with the freezing cold chunk of rock after having traveled over 3 billion miles. And while it's not quite there yet, it'll have traveled about ten years by the time it gets there.
Yesterday - it passed Neptune's orbit.
The reason they sent it out in 2006? To help us learn more about Pluto, because, as it turns out, we don't know much. A Martinez speaks with Emily Lakdawalla - a Senior Editor with the Planetary Society about the New Horizons probe.