On January 1, 2019, NASA’s New Horizons spacecraft flies by a small Kuiper Belt object known scientifically as 2014 MU69, but nicknamed “Ultima Thule.” Ultima is 4 billion miles from […]

On January 1, 2019, Ultima Thule, an object in the Kuiper Belt 4 billion miles from Earth, will be the most ancient and most distant world ever explored close-up. Ultima […]