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The siriometer is a rarely used and an obsolete astronomical unit of length, defined to be equal to about one million astronomical units (au). One siriometer is approxim ..more definition+
Plethron is a measurement used in Ancient times, equal to 100 Greek feet (pous). It was roughly the width of a typical athletic running-track, and was used as the st ..more definition+
In relation to the base unit of [length] => (meters), 1 Siriometer (sir) is equal to 1.496E+17 meters, while 1 Greek Plethron (pleth) = 30.8 meters.| 6990000000000 Siriometer | to common length units |
|---|---|
| 6990000000000 sir | = 1.045704E+30 meters (m) |
| 6990000000000 sir | = 1.045704E+27 kilometers (km) |
| 6990000000000 sir | = 1.045704E+32 centimeters (cm) |
| 6990000000000 sir | = 3.4307874015748E+30 feet (ft) |
| 6990000000000 sir | = 4.1169448818898E+31 inches (in) |
| 6990000000000 sir | = 1.1435958005249E+30 yards (yd) |
| 6990000000000 sir | = 6.4977034120735E+26 miles (mi) |
| 6990000000000 sir | = 1.1052785117852E+14 light years (ly) |
| 6990000000000 sir | = 3.9522675845376E+33 pixels (PX) |
| 6990000000000 sir | = 6.53565E+64 planck length (pl) |