Mission planners preparing for the New Horizons flyby of a Kuiper Belt object on 1 January will attempt to monitor starlight as it is blocked out by the probe’s target, Ultima Thule, to update critical navigation data. Updated 4 August
The frozen faraway miniature world targeted for a high-speed flyby by NASA’s New Horizons spacecraft on 1 January 2019, now has a nickname: Ultima Thule.