About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 84. Chapters: Metre, Nautical mile, Astronomical unit, Picometre, Kilometre, Micrometre, Parsec, Nanometre, Inch, Typographic unit, Centimetre, Geographical mile, Millimetre, Yard, Furlong, Earth radius, Fathom, Smoot, Bohr radius, Caliber, Foot, Light-year, History of measurement, Gauge, Point, Cubit, Chain, Modulor, Shaku, Rod, Light-second, League, Parasang, Gunter's chain, Chi, Angstrom, Pous, Span, Dragstrip, Romanian units of measurement, Planck length, Hand, Unit of length, Hvat, Perch, Femtometre, Yojana, Thou, Pica, Arpent, Rack unit, Cun, Scandinavian mile, Line, Rood, Stadion, Ell, Gunter's measurement, Twip, Solar radius, Megametre, Wa, Ligne, Agate, Verst, Guz, Seconds pendulum, Paris inch, Decametre, Kos, Pace, Hectometre, Decimetre, X unit, Metric foot, Toise, Gigametre, Cable length, Shaftment, Ald, Metric mile, Mbsf, Fistmele, Hat'h, Link, Rope, Scantling, Horse length, Klick, Sana lamjel, Cicero, Pando, Digit, Psilon, Bamboo, Yoctometre, Schoenus, Palm, Day's journey, Siriometer, Light-foot, Finger, Nail, Girah, Fall, Bolt, Bahar, Gaz, Uncia, Jow, A gula, Thneap, Unglie, Spat, Cham am, Hasta, Pes, Arab mile, Nautical airmile, Himetric, Alen, Cana, Homestead, Walking distance measure, Nalva, Gradus, Paris point, Stick, Data mile. Excerpt: An astronomical unit (abbreviated as AU, au or a.u.) is a unit of length equal to about 149,597,870.7 kilometers (92,955,807.27 miles) or approximately the mean Earth-Sun distance. The symbol ua is recommended by the International Bureau of Weights and Measures, and the international standard ISO 80000, while au is recommended by the International Astronomical Union, and is more common in Anglosphere countries. In general, capital letters are only used for the symbols of units which are named after individual scientists, while au or a.u. can also mean atomic unit or even arbitra...
