Convert hour to second (sidereal)
Please provide values below to convert hour [h] to second (sidereal) [None], or Convert second (sidereal) to hour.
How to Convert Hour to Second (Sidereal)
1 h = 3609.8564784738 None
Example: convert 15 h to None:
15 h = 15 × 3609.8564784738 None = 54147.847177107 None
Hour to Second (Sidereal) Conversion Table
| hour | second (sidereal) |
|---|
Hour
An hour is a unit of time equal to 60 minutes or 3,600 seconds.
History/Origin
The hour has origins in ancient civilizations, notably the Babylonians, who divided the day into 24 hours. The modern 24-hour system was standardized in the 14th century and became widely adopted with the advent of mechanical clocks.
Current Use
Hours are used globally to measure and schedule time in daily life, work, transportation, and various scientific and technical applications.
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.