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How many fathom [ancient] in 1 light-day? The answer is 14161874451176. We assume you are converting between fathom [ancient] and light day. You can view more details on each measurement unit: fathom [ancient] or light-day The SI base unit for length is the metre. 1 metre is equal to 0.54674685620558 fathom [ancient], or 3.8606955462749E-14 light-day. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between fathoms and light days. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from light-day to fathom [ancient], or enter any two units below:
A light day (also written light-day) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one day (of 86,400 seconds) or 25,902,068,371,200 metres (~26 Tm).
Note that this value is exact, since the metre is actually defined in terms of the speed of light. The light day isn't very frequently used at all since there are few astronomical objects or distances of that magnitude; the Oort cloud, for example, is thought to extend between 290 and 580 light-days out from the Sun.
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