486958 Arrokoth, the first pristine planetesimal visited by a spacecraft. Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Roman Tkachenko.

Related channels: THE SOLAR SYSTEM, THE SUN, MERCURY, VENUS, EARTH, THE MOON, MARS, JUPITER, SATURN, URANUS, NEPTUNE, DWARF PLANETS, MOONS, ASTEROIDS, COMETSKUIPER BELT