On October 15, 1997, the Cassini–Huygens spacecraft was launched on an almost 7-year journey to the Saturn system. On its way, the spacecraft passed Venus, Earth, and Jupiter — arriving at the Saturn system in 2004.
This hanging sculpture traces the "Prime mission" trajectory of the Cassini probe between 2004- 2008, as it began the first in-depth, up-close study of Saturn and its system of rings and moons.
The 1.2mm diameter "ball of yarn" sculpture begins with a little loop from which to suspend the sculpture, but also trace the approaching trajectory before it begins to orbit around Saturn.
Read more about Cassini Prime mission at: http://sci.esa.int/cassini-huygens/34962-cassini-tour-prime-mission/