Parsec

A parsec was a unit of astronomical distance equivalent to about 30.5 trillion kilometers (3.26 light-years). The standard coordinate grid used by starship navigators to record the location of star systems was based on a scale with measurements of 15 parsecs. For example, Tatooine was less than a parsec away from Geonosis, and the Kamino system was located roughly around twelve parsecs south of the Rishi Maze dwarf satellite galaxy.

During the Clone Wars, the planet Toydaria became vital to breaking the Separatist blockade over Ryloth because it was 2000 parsecs closer to the Ryloth system than the nearest Republic fleet.

Han Solo claimed his starship, Millennium Falcon, made the Kessel Run in "less than twelve parsecs," boasting about its ability to withstand shorter, more dangerous routes through hyperspace. In reality, the Falcon only made it through the Run in less than twelve parsecs on a technicality, as one needed to round down to reach the number Solo claimed.

Text and facts from the “Parsec” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.