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 Thule (pronounced TOO-lee). “This is truly the most primitive object ever encountered by a spacecraft,” said Hal Weaver, project scientist at the Johns Hopkins Applied Physics Laboratory.

The small, icy world known as Ultima Thule has finally been revealed. A new picture returned from Nasa's New Horizons spacecraft shows it to be two objects joined together - to give a look like a ...