Ultima Thule

In June 2014, Hubble discovered Ultima Thule, the farthest object in our solar system ever explored up close by a spacecraft. The New Horizons spacecraft zipped by the object in early 2019, revealing secrets about the outer edges of our solar system. This composite image of Ultima Thule, taken by Hubble, tracks the object a billion miles past Pluto in the Kuiper Belt.

Credits: NASA/STScI/JHUAPL/SwRI