How many gigalight-year in 1 light day? The answer is 2.7397260273973E-12. We assume you are converting between gigalight year and light day. You can view more details on each measurement unit: gigalight-year or light day The SI base unit for length is the metre. 1 metre is equal to 1.0577248071986E-25 gigalight-year, 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 gigalight years and light days. Type in your own numbers in the form to convert the units!
1 gigalight-year to light day = 365000000000 light day
2 gigalight-year to light day = 730000000000 light day
3 gigalight-year to light day = 1095000000000 light day
4 gigalight-year to light day = 1460000000000 light day
5 gigalight-year to light day = 1825000000000 light day
6 gigalight-year to light day = 2190000000000 light day
7 gigalight-year to light day = 2555000000000 light day
8 gigalight-year to light day = 2920000000000 light day
9 gigalight-year to light day = 3285000000000 light day
10 gigalight-year to light day = 3650000000000 light day
You can do the reverse unit conversion from light day to gigalight-year, or enter any two units below:
One gigalight-year, abbreviation "Gly", is one billion light-years — one of the largest distance measures used. One gigalight-year equals 306.601 million parsecs, or roughly one-thirteenth the distance to the horizon of the observable universe (dictated by the cosmic background radiation). Gigalight-years are typically used to measure distances to supergalactic structures, such as clusters of quasars or the Great Wall.
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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