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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.| 1770000000 Siriometer | to common length units |
|---|---|
| 1770000000 sir | = 2.64792E+26 meters (m) |
| 1770000000 sir | = 2.64792E+23 kilometers (km) |
| 1770000000 sir | = 2.64792E+28 centimeters (cm) |
| 1770000000 sir | = 8.6874015748031E+26 feet (ft) |
| 1770000000 sir | = 1.0424881889764E+28 inches (in) |
| 1770000000 sir | = 2.8958005249344E+26 yards (yd) |
| 1770000000 sir | = 1.6453412073491E+23 miles (mi) |
| 1770000000 sir | = 27987739139.626 light years (ly) |
| 1770000000 sir | = 1.0007887875009E+30 pixels (PX) |
| 1770000000 sir | = 1.65495E+61 planck length (pl) |