Minute
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2008-06-07T17:00:35Z
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robot Adding: [[zh-yue:分]]
{{otheruses4|the unit of time, angle and right ascension|the document in which the proceedings of a court or a meeting are recorded|minutes}}
A '''minute''' is a [[unit of measurement]] of [[time]] or of [[angle]].
==Time==
The minute is a [[Unit of measurement|unit]] of [[time]] equal to 1/60th of an [[hour]] or 60 [[second]]s. Some rare minutes have 59 or 61 seconds; see [[leap second]]. The minute is not an [[SI]] unit, however it is accepted for use with SI units.
The symbol for minute or minutes is '''min'''.
The fact that an hour contains 60 minutes is probably due to influences from the [[Babylon]]ians, who used a [[Numeral system|base-60]] or sexagesimal counting system.
==Geometry==
In [[geometry]], the minute is a unit of [[angle]], 1/60th of a [[degree (angle)|degree]]. It is also known as a ''minute of angle'' or ''[[minute of arc]]'' and can further be divided into 60 [[arcsecond|seconds of arc]].
The symbol for a minute of arc is a [[prime (symbol)|prime]] (′). For example, fifteen minutes could be written 15′. However, more commonly an apostrophe, or single quote (<code>U+0027</code>), is used.
==Astronomy==
In [[astronomy]], the minute is a unit of angle, the ''minute of [[right ascension]]''. It is equal to 1/60th of an hour of right ascension and can be further divided into 60 seconds of right ascension.
The symbol for a minute of right ascension is ''min''.
The [[Earth]] turns on its [[Geographical pole|polar]] [[Axis of rotation|axis]] through fifteen minutes of arc in every minute of [[sidereal time]]. One minute of arc at the Earth's [[equator]] is approximately one [[nautical mile]].
==Origin==
The first division was originally known as a "prime minute", from Latin "''(pars) minuta prima''", meaning "first minute (i.e. small) part (or division)" of the hour. Likewise, the [[second]] was known as a "second minute", meaning "the second small division" of the hour.
{{wiktionarypar|minute}}
==References==
{{Nofootnotes|date=February 2008}}
* Henry Campbell Black, [[Black's Law Dictionary]], 6th Edition, entry on Minute. West Publishing Company, St. Paul, Minnesota, 1991.
* Eric W. Weisstein. [http://mathworld.wolfram.com/ArcMinute.html "Arc Minute."] From [[MathWorld]] -- A Wolfram Web Resource. http://mathworld.wolfram.com/ArcMinute.html
* [http://physics.nist.gov/cuu/Units/outside.html Definitions of the SI Units]
{{Time Topics}}
{{Time measurement and standards}}
[[Category:Units of time]]
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[[ay:T'ijuqa]]
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[[bg:Минута]]
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[[ru:Минута]]
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[[ta:மணித்துளி]]
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[[zh:分鐘]]