Not often, but from time to time, units of measurement are given in the dialogue of Star Wars. Should such units of measurement - especially those that are corresponding with units of measurement from Earth - be ignored - or maybe treated as a translation error?
Units of measurement from Earth rely either on arbitrary definitions (e.g. gram, kilogram or ton) or on circumstances found only on Earth (year, lightyear or parsec).
- How probably is it that in Star Wars they have a unit of mass that is based on a prototype that has the same mass as the International Prototype of the Kilogram preserved by the International Bureau of Weights and Measures?
How probably is it that in Star Wars they have a unit of time or a unit of lentgh that is based on a orbital period of a planet moving around its star and that this orbit and period is exactly as long as that of Earth?
Or how probably is it that in Star Wars they have a unit of time that has been defined as the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom at rest, and approaching the theoretical temperature of absolute zero?
- How probably is it that in Star Wars they have a unit of mass that is based on a prototype that has the same mass as the International Prototype of the Kilogram preserved by the International Bureau of Weights and Measures?
The question now is, if this should be the standard assumption or a case to case decision.
For example: In Attack of the Clones Amidala states that Geonosis is less than a parsec away. Can we really use this statement to calculate the verlocity of their ship? Or should this be ignored?