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Time measurement and standards
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The list Time measurement and standards includes
Solstice, John Harrison, Deep Space Atomic Clock, Complication (horology) and Hodinkee.
The list consists of 85 members.
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Solstice
semi-annual astronomical event where the Sun is farthest from above the Earth's equator
Overview: A solstice is the time when the Sun reaches its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around 20–22 June and 20–22 ...
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John Harrison
English clockmaker and horologist
Overview: John Harrison (3 April [O.S. 24 March] 1693 – 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the ...Date of birth: 24 March 1693Date of death: 24 March 1776Age: 83 (age at death)Nationality: BritishOccupation: Inventor 0
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Deep Space Atomic Clock
Atomic clock used for radio navigation in space
Overview: The Deep Space Atomic Clock (DSAC) is a miniaturized, ultra-precise mercury-ion atomic clock for precise radio navigation in deep space. It is orders of magnitude more stable than existing navigation ... 0
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Complication (horology)
Any feature of a timepiece beyond the display of hours, minutes and seconds
Overview: In horology, a complication refers to any feature in a mechanical timepiece beyond the simple display of hours, minutes and seconds. A timepiece indicating only hours, minutes and seconds is known as a ... 0
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Hodinkee
American watch website
Overview: HODINKEE is a blog, e-commerce site, and co-creator of watches. The name is derived from the Czech and Slovak word for wristwatch, “hodinky”. 0
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Sidereal time
time standard
Overview: Sidereal time ("sidereal" pronounced sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers. Using sidereal time and the celestial coordinate system, it is easy to locate the po ... 0
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Time standard
specification for measuring timeOverview: A time standard is a specification for measuring time: either the rate at which time passes or points in time or both. In modern times, several time specifications have been officially recognized as s ... 0
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Chronological dating
method mostly used in identification of various fossils which are about millions and billions years oldOverview: Chronological dating, or simply dating, is the process of attributing to an object or event a date in the past, allowing such object or event to be located in a previously established chronology. This ... 0
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Intercalation (timekeeping)
insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phasesOverview: Intercalation or embolism in timekeeping is the insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require ... 0
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Stopwatch
analog or digital timepiece designed to measure an amount of time, having push buttons to start/stop and reset a time stopping action
Overview: A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. 0
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Timers 3T -
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Chronometer watch
high-precision time piece
Overview: A chronometer (Ancient Greek: χρονόμετρον, khronómetron, "time measurer") is an extraordinarily accurate mechanical timepiece, with an original focus on the needs of maritime navigation. In Switzerland ... 0
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Timekeeper
An instrument or person that measures the passage of timeOverview: A timekeeper is a person that measures the passage of time. They may have additional functions in sports and business. 0
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24-hour clock
timekeeping conventionOverview: The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated by the hours (and minutes) passed since midnight ... 0
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Atomic clock
extremely accurate reference clock used as a standard for timekeeping
Overview: An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different ... 0
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Universal Time
time standard based on the slowing rotation of the EarthOverview: Universal Time (UT or UT1) is a time standard based on Earth's rotation. While originally it was mean solar time at 0° longitude, precise measurements of the Sun are difficult. Therefore, UT1 is computed ... 0
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Marine chronometer
portable timepiece
Overview: A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing ... 0
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Week
unit of time
Overview: A week is a unit of time equal to seven days. It is the standard time period used for short cycles of days in most parts of the world. The days are often used to indicate common work days and rest days ... 0
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Solar calendar
type of calendarOverview: A solar calendar is a calendar whose dates indicate the season or almost equivalently the apparent position of the Sun relative to the stars. The Gregorian calendar, widely accepted as a standard in the ... 0
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Water clock
timepiece in which time is measured by the flow of liquid into a vessel
Overview: A water clock, or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal' and ὕδωρ (hydor) 'water'; lit. ' water thief'), is a timepiece by which ... 0
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Leap year
type of year that has 366 days, instead of 365 for a common yearOverview: A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th ... 0
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