On 11 Jan 2006 at 0:08, Tim Shepard wrote: > If humans spread out to other places besides the earth, an > earth-centric time scale might begin to seem somewhat quaint. > Distributing leap second information to a Mars colony seems kind of > silly.
As I recall, the NASA Mars missions are using Mars-centric time scales, which include a "Martian second" that has a different length from the SI second in order for the different-length Martian day (called a "Sol") to be subdivided into a familiar 24 "hours" composed of 60 "minutes" each with 60 "seconds". If, however, this Martian second is actually defined as a particular multiple of the SI second, then the use of leap seconds on Mars would ultimately be necessary to account for any future changes in the length of the Martian day. -- == Dan == Dan's Mail Format Site: http://mailformat.dan.info/ Dan's Web Tips: http://webtips.dan.info/ Dan's Domain Site: http://domains.dan.info/