Meet Arrokoth – the most distant object yet visited by earthlings – seen by the New Horizons spacecraft in early 2019. It’s very old, one of the first generation of objects in our solar system. Here’s why it looks like a snowman.
Rosetta journeyed through space for 12 years and performed early flybys of Earth, Mars and 2 asteroids before arriving at comet 67P/Churyumov-Gerasimenko. It produced nearly 100,000 images. Some of the best, here.