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Time

The list "Time" has been viewed 3 times.
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  • John Harrison
    John Harrison English clockmaker and horologist
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    rank #1 ·
    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 problem of calculating longitude while at sea.
  • Deep Space Atomic Clock
    Deep Space Atomic Clock Atomic clock used for radio navigation in space
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    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 clocks, and has been refined to limit drift of no more than 1 nanosecond in 10 days. It is expected that a DSAC would incur no more than 1 microsecond of error in 10 years of operations. It is expected to improve the precision of deep space navigation, and enable more efficient use of tracking networks. The project is managed by NASA's Jet Propulsion Laboratory and it was deployed as part of the U.S. Air Force's Space Test Program 2 (STP-2) mission aboard a SpaceX Falcon Heavy rocket on 25 June 2019.
  • Complication (horology)
    Complication (horology) Any feature of a timepiece beyond the display of hours, minutes and seconds
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    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 simple movement. Common complications in commercial watches are day/date displays, alarms, chronographs (stopwatches), and automatic winding mechanisms.
  • Hodinkee
    Hodinkee American watch website
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    rank #4 ·
    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”.
  • Sidereal time
    Sidereal time Timekeeping system
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    rank #5 ·
    Sidereal time is a timekeeping system that astronomers use to locate celestial objects. Using sidereal time, it is possible to easily point a telescope to the proper coordinates in the night sky. Briefly, sidereal time is a "time scale that is based on Earth's rate of rotation measured relative to the fixed stars".
  • Time standard Specification for measuring time
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    rank #6 ·
    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 standards, where formerly they were matters of custom and practice. An example of a kind of time standard can be a time scale, specifying a method for measuring divisions of time. A standard for civil time can specify both time intervals and time-of-day.
  • Digital clock
    Digital clock Type of clock that displays the time with numbers
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    rank #7 ·
    A digital clock is a type of clock that displays the time digitally (i.e. in numerals or other symbols), as opposed to an analog clock, where the time is indicated by the positions of rotating hands.
  • Chronological dating Dating method
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    rank #8 ·
    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 usually requires what is commonly known as a "dating method". Several dating methods exist, depending on different criteria and techniques, and some very well known examples of disciplines using such techniques are, for example, history, archaeology, geology, paleontology, astronomy and even forensic science, since in the latter it is sometimes necessary to investigate the moment in the past in which the death of a cadaver occurred.
  • Intercalation (timekeeping) Insertion of a leap day, week, or month
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    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 intercalations of both days and months.
  • Stopwatch
    Stopwatch Handheld timepiece designed to measure an amount time
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    rank #10 ·
    A stopwatch is a handheld timepiece designed to measure the amount of time that elapses between its activation and deactivation.
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