How many light-hour in 1 AU? The answer is 0.13861243995449. We assume you are converting between light hour and astronomical unit. You can view more details on each measurement unit: light-hour or AU The SI base unit for length is the metre. 1 metre is equal to 9.2656693110598E-13 light-hour, or 6.6845871222684E-12 AU. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between light hours and astronomical units. Type in your own numbers in the form to convert the units!
1 light-hour to AU = 7.21436 AU
5 light-hour to AU = 36.0718 AU
10 light-hour to AU = 72.1436 AU
15 light-hour to AU = 108.2154 AU
20 light-hour to AU = 144.28719 AU
25 light-hour to AU = 180.35899 AU
30 light-hour to AU = 216.43079 AU
40 light-hour to AU = 288.57439 AU
50 light-hour to AU = 360.71798 AU
You can do the reverse unit conversion from AU to light-hour, or enter any two units below:
A light-hour (also written light hour) is a unit of length. It is the distance travelled by light in vacuum in one hour. Based on the current definition of the metre a light-hour is equal to 1,079,252,848,800 metres (~1.08 Tm).
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".
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