Ultima Thule is the most distant object to be explored by a spacecraft Scientists are getting closer to understanding how the distant object known as Ultima Thule came to be. Nasa's New Horizons ...
Ultima is unique." Did you catch the BBC's Sky At Night special on New Horizons' flyby of Ultima Thule? Watch Chris Lintott and Maggie Aderin-Pocock now on the BBC iPlayer.
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