How many zettametre in 1 light-day? The answer is 2.59020683712E-8. We assume you are converting between zettametre and light day. You can view more details on each measurement unit: zettametre or light-day The SI base unit for length is the metre. 1 metre is equal to 1.0E-21 zettametre, 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 zettameters and light days. Type in your own numbers in the form to convert the units!
1 zettametre to light-day = 38606955.46275 light-day
2 zettametre to light-day = 77213910.9255 light-day
3 zettametre to light-day = 115820866.38825 light-day
4 zettametre to light-day = 154427821.851 light-day
5 zettametre to light-day = 193034777.31375 light-day
6 zettametre to light-day = 231641732.77649 light-day
7 zettametre to light-day = 270248688.23924 light-day
8 zettametre to light-day = 308855643.70199 light-day
9 zettametre to light-day = 347462599.16474 light-day
10 zettametre to light-day = 386069554.62749 light-day
You can do the reverse unit conversion from light-day to zettametre, or enter any two units below:
The SI prefix "zetta" represents a factor of 1021, or in exponential notation, 1E21.
So 1 zettametre = 1021 metre.
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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