As of 2022, what is the most distant object explored by a spacecraft?
Arrokoth is a small, icy world located in the Kuiper Belt, a region beyond Neptune that is home to numerous dwarf planets and asteroids. Formerly known as Ultima Thule, Arrokoth was first discovered by NASA's 'New Horizons' spacecraft on 1st January 2019, during its historic flyby of the dwarf planet Pluto. After completing its primary mission of studying Pluto, 'New Horizons' continued its journey deeper into the Kuiper Belt, where it encountered Arrokoth. This encounter marked the farthest exploration of any object in the solar system.
Unlike other celestial bodies that have been subjected to significant geological activity or collisions, Arrokoth appears to have remained largely unchanged since its formation over 4.5 billion years ago. This makes it a valuable time capsule, offering scientists a unique opportunity to study the early stages of our solar system's development.
Arrokoth's shape is also of great interest to researchers. It has a distinct bilobed structure, resembling two spheres that have gently merged together. This unusual shape suggests that Arrokoth may have formed through a process known as "contact binary formation," where two separate objects gradually came together under the influence of gravity. By studying Arrokoth's shape and composition, scientists hope to gain insights into the dynamics of early planet formation and the role of collisions in shaping celestial bodies.
