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  2. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    1.44 minutes, or 86.4 seconds. Also marketed as a ".beat" by the Swatch corporation. moment: 1/40 solar hour (90 s on average) Medieval unit of time used by astronomers to compute astronomical movements, length varies with the season. [4] Also colloquially refers to a brief period of time. centiday 0.01 d (1 % of a day) 14.4 minutes, or 864 ...

  3. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    For others, there would be 50 decimal minutes per decimal hour, and 100 decimal seconds per decimal minute. His new hours, minutes, and seconds would thus be more similar to the old units. [14] C.A. Prieur (of the Côte-d'Or), read at the National Convention on Ventôse 11, year III (March 1, 1795):

  4. Sidereal time - Wikipedia

    en.wikipedia.org/wiki/Sidereal_time

    More exactly, sidereal time is the angle, measured along the celestial equator, from the observer's meridian to the great circle that passes through the March equinox (the northern hemisphere's vernal equinox) and both celestial poles, and is usually expressed in hours, minutes, and seconds. (In the context of sidereal time, "March equinox" or ...

  5. Casio CA-53W - Wikipedia

    en.wikipedia.org/wiki/Casio_CA-53W

    Like the time, the date is also set by inputting values via the keypad. The button operation tones of the watch can be switched on and off by pressing the adjust pusher in the calculator mode. The display of the watch shows hours, minutes, seconds and day of the week. The date can be viewed by pressing the division (÷) key on the keypad while ...

  6. Hour - Wikipedia

    en.wikipedia.org/wiki/Hour

    An hour (symbol: h; [1] also abbreviated hr) is a unit of time historically reckoned as 1 ⁄ 24 of a day and defined contemporarily as exactly 3,600 seconds . There are 60 minutes in an hour, and 24 hours in a day. The hour was initially established in the ancient Near East as a variable measure of 1 ⁄ 12 of the night or daytime.

  7. Binary clock - Wikipedia

    en.wikipedia.org/wiki/Binary_clock

    Binary large-scale electronic clock, designed by the artist Norbert Möslang, to indicate the time of day on 3 lines in hours, minutes, seconds on the face of the main railway station in St. Gallen, Switzerland. Time indicated is 9 o'clock 25 minutes 46 seconds.

  8. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    1.67 minutes (or 1 minute 40 seconds) 10 3: kilosecond: 1 000: 16.7 minutes (or 16 minutes and 40 seconds) 10 6: megasecond: 1 000 000: 11.6 days (or 11 days, 13 hours, 46 minutes and 40 seconds) 10 9: gigasecond: 1 000 000 000: 31.7 years (or 31 years, 252 days, 1 hour, 46 minutes, 40 seconds, assuming that there are 7 leap years in the interval)

  9. Equation of time - Wikipedia

    en.wikipedia.org/wiki/Equation_of_time

    As the apparent daily movement of the Sun is one revolution per day, that is 360° every 24 hours, and the Sun itself appears as a disc of about 0.5° in the sky, simple sundials can be read to a maximum accuracy of about one minute. Since the equation of time has a range of about 33 minutes, the difference between sundial time and clock time ...