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library:astrometrics [2021/08/04 02:42] – [Units] site_adminlibrary:astrometrics [2021/08/04 03:05] – site_admin
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 The base unit of time -- the day -- is established by the vibrational frequency of the cesium-133 atom (expressed as Δ//v//<sub>Cs</sub>) at a temperature of zero Kelvin (-273.15°C), which is exactly 290,097,396,344,952 vibrations from the ground state of the isotope to a hyperfine energy level. This is the most stable and reproducible phenomena in nature, as it is accurate over a time span of hundreds of millions of years. The base unit of time -- the day -- is established by the vibrational frequency of the cesium-133 atom (expressed as Δ//v//<sub>Cs</sub>) at a temperature of zero Kelvin (-273.15°C), which is exactly 290,097,396,344,952 vibrations from the ground state of the isotope to a hyperfine energy level. This is the most stable and reproducible phenomena in nature, as it is accurate over a time span of hundreds of millions of years.
  
-Days form the basis of the stardate time measurement system in Starfleet and the Federation, and extensions of the day is year, where 1000 days equals one year.  Hours, minutes, and seconds are considered subsidiary to the day due to the diversity of planetary dynamics between the worlds of the Federation, where some planets rotate faster or slower than others.  Therefore, they are used only in the context of maintaining a circadian rhythm aboard a Starfleet vessel, allowing them to synchronize to a common standard across the fleet.  For this purpose, an easily-convertable metric for determining an hour is one-tenth of a day.  Additionally, due to the fact that Starfleet was originally an Earth-centric organization, a minute is considered one-sixtieth of an hour, and a second is one-sixtieth of a minute.  This allows for a day to remain an easily convertible metric from hours (10 hours equal a day), and a minute to continue an Earth tradition of being sixty seconds.  There are no delineations for weeks or months in the stardate time measurement system. +Days form the basis of the stardate time measurement system in Starfleet and the Federation, an extension of the day is year, where 1000 days equals one year.  Hours, minutes, and seconds are considered subsidiary to the day due to the diversity of planetary dynamics between the worlds of the Federation, where some planets rotate faster or slower than others.  Therefore, they are used only in the context of maintaining a circadian rhythm aboard a Starfleet vessel, allowing them to synchronize to a common standard across the fleet.  For this purpose, an easily-convertable metric for determining an hour is one-tenth of a day.  Additionally, due to the fact that Starfleet was originally an Earth-centric organization, a minute is considered one-sixtieth of an hour, and a second is one-sixtieth of a minute.  This allows for a day to remain an easily convertible metric from hours (10 hours equal a day), and a minute to continue an Earth tradition of being sixty seconds.  There are no delineations for weeks or months in the stardate time measurement system. 
  
 In Starfleet, it is very common for starships to continue utilizing a 24-hour clock for establishing daily schedules and routines, and then switch to stardates for multi-day events and log entries.  Aboard a Starfleet vessel with a mostly humanoid crew, a single "day" is still colloquially referred to as a normal day/night schedule in order to maintain a circadian rhythm, which will equal to approximately 2.74 days under the stardate measure.  The same can be said for weeks and months, where the 7-day week based on Hellenistic astrology from Terran history is still occasionally used by the crew to breakup the monotony of 1000-day year in the stardate system.  In fact, a stardate "day" will often coincide with a shift change on starship, which happens roughly every 8.767 hours on the 24-hour Terran clock.  Normally, it is up to the skipper to define whether that shift change occurs on the Terran or the stardate system.  Regardless, all official ship business is required to be recorded in the stardate system. In Starfleet, it is very common for starships to continue utilizing a 24-hour clock for establishing daily schedules and routines, and then switch to stardates for multi-day events and log entries.  Aboard a Starfleet vessel with a mostly humanoid crew, a single "day" is still colloquially referred to as a normal day/night schedule in order to maintain a circadian rhythm, which will equal to approximately 2.74 days under the stardate measure.  The same can be said for weeks and months, where the 7-day week based on Hellenistic astrology from Terran history is still occasionally used by the crew to breakup the monotony of 1000-day year in the stardate system.  In fact, a stardate "day" will often coincide with a shift change on starship, which happens roughly every 8.767 hours on the 24-hour Terran clock.  Normally, it is up to the skipper to define whether that shift change occurs on the Terran or the stardate system.  Regardless, all official ship business is required to be recorded in the stardate system.
library/astrometrics.txt · Last modified: 2024/01/03 02:45 by site_admin

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