Since it explored Pluto in 2015, the New Horizons spacecraft has been zooming toward NASA's most distant target yet. Join the mission team as the probe attempts to fly by Ultima Thule, an object 4 billion miles from Earth.
2007
2005
1991
1994
1986
2001
2024
2017
2000
2021
2022
2020
1897
2019
2008