While New Horizons is exploring new targets, researchers are still working on the mountains of data it returned in 2015 from its visit to Pluto and its moon Charon. Charon is Pluto’s largest companion, and like Pluto, it has a complicated, icy surface dotted with mountains and canyons. Large parts of Charon’s surface appear to have been resurfaced in the past, leading to theories of an underground ocean that could have erupted long ago.

New Horizons’ best views of Charon were of its side