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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    1.609 km – 1 statute mile; 1.852 km – 1 nautical mile, equal to 1 arcminute of latitude at the surface of the Earth [140] 1.991 km – span of the Akashi Kaikyō Bridge [141] 2.309 km – axial length of the Three Gorges Dam, the largest dam in the world located in China [34]

  3. Cable length - Wikipedia

    en.wikipedia.org/wiki/Cable_length

    A cable's length (often "cable length" or just "cable") is simply the standard length in which cables came, which by 1555 had settled to around 100 fathoms (600 ft; 180 m) or 1 ⁄ 10 nautical mile (0.19 km; 0.12 mi). [1] Traditionally rope is made on long ropewalks, the length of which determines the maximum length of rope it is possible to make.

  4. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    One arcsecond is the approximate angle subtended by a U.S. dime coin (18 mm) at a distance of 4 kilometres (about 2.5 mi). [6] An arcsecond is also the angle subtended by an object of diameter 725.27 km at a distance of one astronomical unit, an object of diameter 45 866 916 km at one light-year,

  5. Light-second - Wikipedia

    en.wikipedia.org/wiki/Light-second

    1.813 × 10 11 km: 1.127 × 10 11 miles: The Oort cloud is thought to extend between 41 and 82 light-weeks out from the Sun light-year 365.25 light-days = 31 557 600 light-seconds 9 460 730 472 580 800 m: 9.461 × 10 12 km: 5.879 × 10 12 miles: Proxima Centauri is the nearest star to the Sun, about 4.24 light years away

  6. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    Earth radius R 🜨 ≈ 6,371 km [9] Lunar distance LD ≈ 384 402 km. [10] Average distance between the center of Earth and the center of the Moon. astronomical unit au. Defined as 149 597 870 700 m. [11] Approximately the distance between the Earth and Sun. light-year ly ≈ 9 460 730 472 580.8 km.

  7. Earth radius - Wikipedia

    en.wikipedia.org/wiki/Earth_radius

    Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).

  8. Milestone - Wikipedia

    en.wikipedia.org/wiki/Milestone

    Old and new railway mileposts in the UK, indicating a distance of 33 + 1 ⁄ 4 miles (53.5 km) from the zero point The Railways Clauses Consolidation Act 1845 [ 8 ] compels UK railway companies to provide their passengers with a means of determining the distance travelled (fares were set by distance at this time).

  9. Astronomical unit - Wikipedia

    en.wikipedia.org/wiki/Astronomical_unit

    Radius of the Sun (695 500 km, 432 450 mi, a hundred times the radius of Earth or ten times the average radius of Jupiter) – Light-minute: 0.12 – Distance light travels in one minute – Mercury: 0.39 – Average distance from the Sun – Venus: 0.72 – Average distance from the Sun – Earth: 1.00 –