Convert 129 Light Years to Astronomical Units
How far is 129 light years? How long is 129 light years in astronomical units? 129 ly to AU conversion.
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129 Light Years ≈
8,158,098.9 Astronomical Units
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Result in Plain English
129 light years is equal to about 8.16 million astronomical units.
In Scientific Notation
129 light years
= 1.29 x 102 light years
≈ 8.1581 x 106 astronomical units
Light Years
A light year is the distance that light travels in one year. The year used by the International Astronomical Union is 365.25 days. A light year is defined as exactly 9,460,730,472,580.8 kilometers.
Astronomical Units
An astronomical unit is the average distance between the Earth and the Sun. Estimates of this distance have varied over time. It is now defined as exactly 149,597,870.7 kilometers.