New Horizons' flyby took place about a billion miles beyond Pluto, which was until now the most faraway world ever visited up close by a spacecraft.
The returned New Horizons spacecraft has sent back the first image of the ice world, Ultima Thule.
Ultima Thule is one of hundreds of thousands of space rock in the uncharted heart of the Kuiper Belt, a ring of icy celestial bodies just outside Neptune's orbit.
The flyby took place about a billion miles beyond Pluto, which was until now the most faraway world ever visited up close by a spacecraft.
Luca Cortese, Senior Research Fellow at the Internation Centre for Radio Astronomy Research, of The University Western Australia explores with SBS the significance of this enterprise.
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