The most remote world ever seen up close is a mash-up of smaller pieces.
Arrokoth
Posted inEditors' Highlights
A Glimpse at Planet Formation at the Dawn of the Solar System
The low density of Kuiper Belt Object Arrokoth sheds light on the formation of planetesimals in the early solar system.
Posted inNews
New Horizons Sends First Looks of 2014 MU69
Explore 10 things scientists have already learned about the most distant object visited by a spacecraft from Earth.
Posted inNews
World Without Time
On New Year's Day 2019, a spacecraft known for its historic flyby of Pluto will take an unprecedented look into the distant past by flying right up to a frozen remnant of the original solar system.