does anyone know the full form of GMT??

is it a) greenwich meridian time?? or b)greenwich mean time???

or something else??

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  • Anonymous
    1 decade ago
    Favorite Answer

    Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal Observatory, Greenwich in England. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time scale which only approximates GMT in the old sense. It is also used to refer to Universal Time (UT), which is the astronomical concept that directly replaced the original GMT.

    Noon Greenwich Mean Time is not necessarily the moment when the Sun crosses the Greenwich meridian (and reaches its highest point in the sky in Greenwich) because of Earth's uneven speed in its elliptic orbit and its axial tilt. This event may be up to 16 minutes away from noon GMT (this discrepancy is known as the equation of time). The fictitious mean sun is the annual average of this nonuniform motion of the true Sun, necessitating the inclusion of mean in Greenwich Mean Time.

    Historically the term GMT has been used with two different conventions for numbering hours. The old astronomical convention (before 1925) was to refer to noon as zero hours, whereas the civil convention during the same period was to refer to midnight as zero hours. The latter is modern astronomical and civil convention. The more specific terms UT and UTC do not share this ambiguity, always referring to midnight as zero hours.

  • Anonymous
    1 decade ago

    Greenwich Mean Time

  • 1 decade ago

    Greenwich Mean Time

  • travel
    Lv 4
    1 decade ago

    Greenwich Meridian Time or Greenwich Mean Time.

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  • 1 decade ago

    Greenwich Mean Time

    for more information, check out

    http://www.greenwichmeantime.com/

  • Anonymous
    1 decade ago

    My dictionary confirms "GMT" to refer to "Greenwich mean time". It is the standard from which our longitude time zone corrections are made.

    Source(s): in part from the American Heritage College Dictionary, and also from childhood education.
  • 1 decade ago

    it is greenwich mean time

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