How many astronomical units in 1 light-second? The answer is 0.0020039888041. We assume you are converting between astronomical unit and light second. You can view more details on each measurement unit: astronomical units or light-second The SI base unit for length is the metre. 1 metre is equal to 6.6845871222684E-12 astronomical units, or 3.3356409519815E-9 light-second. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between astronomical units and light seconds. Type in your own numbers in the form to convert the units!
1 astronomical units to light-second = 499.00478 light-second
2 astronomical units to light-second = 998.00957 light-second
3 astronomical units to light-second = 1497.01435 light-second
4 astronomical units to light-second = 1996.01914 light-second
5 astronomical units to light-second = 2495.02392 light-second
6 astronomical units to light-second = 2994.0287 light-second
7 astronomical units to light-second = 3493.03349 light-second
8 astronomical units to light-second = 3992.03827 light-second
9 astronomical units to light-second = 4491.04305 light-second
10 astronomical units to light-second = 4990.04784 light-second
You can do the reverse unit conversion from light-second to astronomical units, or enter any two units below:
The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length defined to be exactly equal to 149,597,870,700 metres. Historically, the astronomical unit was conceived as the average Earth-Sun distance (the average of Earth's aphelion and perihelion), before its modern redefinition.
The symbol "ua" is recommended by the Bureau International des Poids et Mesures, but in the United States and other anglophone countries the reverse usage is more common. The International Astronomical Union recommends "au" and international standard ISO 31-1 uses "AU".
A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the light second. It is just over 186,282 miles and almost 109 feet.
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