Convert hour (sidereal) to Planck time
Please provide values below to convert hour (sidereal) [None] to Planck time [None], or Convert Planck time to hour (sidereal).
How to Convert Hour (Sidereal) to Planck Time
1 None = 6.66010661230002e+46 None
Example: convert 15 None to None:
15 None = 15 × 6.66010661230002e+46 None = 9.99015991845003e+47 None
Hour (Sidereal) to Planck Time Conversion Table
| hour (sidereal) | Planck time |
|---|
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.
Planck Time
Planck time is the theoretical minimum meaningful unit of time, approximately 5.39 × 10^-44 seconds, representing the time it takes for light to travel one Planck length in a vacuum.
History/Origin
Introduced by physicist Max Planck in 1899 as part of his system of natural units, it arises from fundamental constants and marks the scale at which classical ideas about gravity and space-time cease to be valid, requiring a quantum theory of gravity.
Current Use
Primarily used in theoretical physics and cosmology to describe phenomena at the Planck scale, and as a fundamental unit in models of quantum gravity; it is not used in everyday measurements.