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The astronomical unit (symbol au, or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, f ..more definition+
In relation to the base unit of [length] => (meters), 1 Astronomical Unit (au) is equal to 149597870700 meters, while 1 Rems (rem) = 0.0042333328 meters.| 81 Astronomical Unit | to common length units |
|---|---|
| 81 au | = 12117427526700 meters (m) |
| 81 au | = 12117427526.7 kilometers (km) |
| 81 au | = 1.21174275267E+15 centimeters (cm) |
| 81 au | = 39755339654528 feet (ft) |
| 81 au | = 4.7706407585433E+14 inches (in) |
| 81 au | = 13251779884843 yards (yd) |
| 81 au | = 7529420389.1151 miles (mi) |
| 81 au | = 0.00128077661206 light years (ly) |
| 81 au | = 4.5798157051862E+16 pixels (PX) |
| 81 au | = 7.5733922041875E+47 planck length (pl) |