Convert second (sidereal) to quindecennial
Please provide values below to convert second (sidereal) [None] to quindecennial [None], or Convert quindecennial to second (sidereal).
How to Convert Second (Sidereal) to Quindecennial
1 None = 2.10677103666523e-09 None
Example: convert 15 None to None:
15 None = 15 × 2.10677103666523e-09 None = 3.16015655499785e-08 None
Second (Sidereal) to Quindecennial Conversion Table
| second (sidereal) | quindecennial |
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Second (Sidereal)
A second (sidereal) is the time measurement based on Earth's rotation relative to distant stars, approximately 3 minutes shorter than the solar second, used in astronomy.
History/Origin
The sidereal second has origins in astronomical observations of Earth's rotation relative to distant celestial objects. It was established to provide a precise time standard for celestial measurements, differing from the solar second used in everyday timekeeping.
Current Use
The sidereal second is primarily used in astronomy and astrophysics for precise time measurements related to celestial events, star tracking, and satellite navigation systems.
Quindecennial
A quindecennial is a period of fifteen years.
History/Origin
The term originates from Latin, where 'quindecim' means fifteen, and has been used historically to denote a fifteen-year interval, often in contexts like anniversaries or historical cycles.
Current Use
The term 'quindecennial' is rarely used in modern times; more common references to fifteen-year periods are made using 'quindecennial' mainly in historical or formal contexts, such as quinquennial (five-year) or sesquicentennial (150 years).