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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 Zeptometers (zm) is equal to 1.0E-21 meters, while 1 Astronomical Unit (au) = 149597870700 meters.| 4000 Zeptometers | to common length units |
|---|---|
| 4000 zm | = 4.0E-18 meters (m) |
| 4000 zm | = 4.0E-21 kilometers (km) |
| 4000 zm | = 4.0E-16 centimeters (cm) |
| 4000 zm | = 1.3123359580052E-17 feet (ft) |
| 4000 zm | = 1.5748031496063E-16 inches (in) |
| 4000 zm | = 4.3744531933508E-18 yards (yd) |
| 4000 zm | = 2.4854847689493E-21 miles (mi) |
| 4000 zm | = 4.227882887644E-34 light years (ly) |
| 4000 zm | = 1.5118112140865E-14 pixels (PX) |
| 4000 zm | = 2.5E+17 planck length (pl) |