NASA spacecraft will make history by becoming the first probe to fly by the most distant planetary body ever explored - Pluto.
The New Horizons spacecraft will be flying past and relaying images and data back to Earth.
Pluto enjoyed full planet status when the mission took off from Florida's coast in the United States nine years ago, on its five billion kilometre voyage.
Although Pluto is no longer classified as a planet, it's still of great interest to scientists.
Carolyn Porco, who worked on the New Horizons mission, told Santilla Chingaipe, about her hopes for the mission.
(Click on the audio tab above to hear the full interview)
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