It visited Pluto in 2015\, and kept going. Now NASA’s New Horizons probe will pass near a mysterious object in the Kuiper belt\, making it the most distant world ever visited by a spacecraft. Scientists hope to learn more about how the solar system formed as they study Ultima Thule. Read more about why the New Horizons flyby portends a new age of planetary discovery here: https://nyti.ms/2Rry4b2
