Convert hour (sidereal) to year
Please provide values below to convert hour (sidereal) [None] to year [y], or Convert year to hour (sidereal).
How to Convert Hour (Sidereal) to Year
1 None = 0.00011376563585317 y
Example: convert 15 None to y:
15 None = 15 × 0.00011376563585317 y = 0.00170648453779755 y
Hour (Sidereal) to Year Conversion Table
| hour (sidereal) | year |
|---|
Hour (Sidereal)
An hour (sidereal) is a unit of time based on the Earth's rotation relative to distant stars, equal to approximately 3,894 seconds, used primarily in astronomy.
History/Origin
The sidereal hour originated from the ancient division of the day based on Earth's rotation relative to the stars, differing from the solar hour by about 4 minutes, and has been used historically in astronomy for precise timekeeping.
Current Use
Sidereal hours are mainly used in astronomy and astrophysics to measure celestial events and the Earth's rotation relative to distant celestial objects, rather than in everyday timekeeping.
Year
A year is the period of time it takes for the Earth to complete one orbit around the Sun, approximately 365.25 days.
History/Origin
The concept of a year has been used since ancient times, with various civilizations developing calendars based on lunar and solar cycles. The Gregorian calendar, introduced in 1582, standardized the length of the year as 365 days with a leap year every four years to account for the extra quarter day.
Current Use
The year is widely used as a basic unit of time measurement for calendars, planning, and record-keeping worldwide, with the Gregorian calendar being the most common system in use today.