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  2. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    m/s 2: ≡ 1 m/s 2 = 1 m/s 2: mile per hour per second: mph/s ≡ 1 mi/(h⋅s) = 4.4704 × 10 −1 m/s 2: mile per minute per second: mpm/s ≡ 1 mi/(min⋅s) = 26.8224 m/s 2: mile per second squared: mps 2: ≡ 1 mi/s 2 = 1.609 344 × 10 3 m/s 2: standard gravity: g 0: ≡ 9.806 65 m/s 2 = 9.806 65 m/s 2

  3. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    A light-year is the distance light travels in one Julian year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri, the closest star to Earth after the Sun, is around 4.2 light-years away. [89]

  4. Light-year - Wikipedia

    en.wikipedia.org/wiki/Light-year

    The Andromeda Galaxy is approximately 2.5 million light-years away. 3 × 10 6 ly: The Triangulum Galaxy , at about 3 million light-years away, is the most distant object visible to the naked eye. 5.9 × 10 7 ly: The nearest large galaxy cluster, the Virgo Cluster, is about 59 million light-years away. 1.5 × 10 8 – 2.5 × 10 8 ly

  5. Help:Convert units - Wikipedia

    en.wikipedia.org/wiki/Help:Convert_units

    Metric prefixes; Text Symbol Factor or; yotta Y 10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T

  6. Light-second - Wikipedia

    en.wikipedia.org/wiki/Light-second

    Miles light-second 1 light-second 299 792 458 m: 2.998 × 10 5 km: 1.863 × 10 5 miles: Average distance from the Earth to the Moon is about 1.282 light-seconds light-minute 60 light-seconds = 1 light-minute 17 987 547 480 m: 1.799 × 10 7 km: 1.118 × 10 7 miles: Average distance from the Earth to the Sun is 8.317 light-minutes light-hour 60 ...

  7. English Engineering Units - Wikipedia

    en.wikipedia.org/wiki/English_Engineering_Units

    Units for other physical quantities are derived from this set as needed. In English Engineering Units, the pound-mass and the pound-force are distinct base units, and Newton's Second Law of Motion takes the form = where is the acceleration in ft/s 2 and g c = 32.174 lb·ft/(lbf·s 2).

  8. Pound (force) - Wikipedia

    en.wikipedia.org/wiki/Pound_(force)

    The pound-force is the product of one avoirdupois pound (exactly 0.45359237 kg) and the standard acceleration due to gravity, approximately 32.174049 ft/s 2 (9.80665 m/s 2). [ 5 ] [ 6 ] [ 7 ] The standard values of acceleration of the standard gravitational field ( g n ) and the international avoirdupois pound (lb) result in a pound-force equal ...

  9. Speed of gravity - Wikipedia

    en.wikipedia.org/wiki/Speed_of_gravity

    the length of Earth's equator: 134 ms: from Moon to Earth: 1.3 s: from Sun to Earth (1 AU) 8.3 min: one light year: 1.0 year: one parsec: 3.26 years: from nearest star to Sun (1.3 pc) 4.2 years: from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth: 25 000 years: across the Milky Way: 100 000 years: from the Andromeda Galaxy to Earth ...