A light year, also light-year, abbreviated ly, is the distance light travels in one year.
Since the Galactic Standard Calendar used a year of 368 days, the length of a Galactic Standard Light Year would have been 9,531,961,160,601,600 meters.
Behind the scenesEdit
This assumes that the "Galactic Standard" Day, Hour, etc. and Meter are equal to Earth's. The Galactic light year was 0.75% longer than an Earth based light year.
It is also possible that Galactic days (and hours etc.) were 0.75% shorter than their Earth equivalents, and that the light years are the same length. (see below)
The exact length of a light year depends on the exact length used for one “year”. On Earth The IAU uses a Julian year of 365.25 days, while other sources may use a Gregorian year of 365.2425 days, or another year altogether.
|Source||year (days)||light year (kilometer)||light year (miles)|
|365.242199||9.460 528 4 ×1015||5.878 499 81 ×1012|
|Yahoo||365.2411‡||9.460 5 ×1015||5,878,482,164,161|
‡ Note that while Yahoo separately reports a year length of 365.24220 days, its rounding of the light year length to five digits, works out to a year length of ~365.2411 days.
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