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New Horizons set to fly over Ultima Thule, the most distant world we've ever explored


This illustration provided by NASA shows the New Horizons spacecraft.© NASA/JHUAPL/SwRI via APThis illustration provided by NASA shows the New Horizons spacecraft.
Three years ago, we stared with awe at the first close-up images of Pluto captured by NASA's New Horizons spacecraft. Now the spacecraft is set to make history again as it flies by an even more distant world.
Ultima Thule lies 1.6 billion kilometres beyond Pluto in the Kuiper Belt — a cosmic doughnut of small primitive objects.
No spacecraft has ever explored a world this far away from the Sun, said Alan Stern, the mission's principal investigator of the Southwest Research Institute in Boulder, Colorado.
"It took us almost 13 years to get there travelling at this amazing speed of more than a million kilometres per day," DrStern said.

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