Convert day (sidereal) to day
Please provide values below to convert day (sidereal) [None] to day [d], or Convert day to day (sidereal).
How to Convert Day (Sidereal) to Day
1 None = 0.997269565972222 d
Example: convert 15 None to d:
15 None = 15 × 0.997269565972222 d = 14.9590434895833 d
Day (Sidereal) to Day Conversion Table
| day (sidereal) | day |
|---|
Day (Sidereal)
A sidereal day is the time it takes for the Earth to complete one rotation relative to distant stars, approximately 23 hours, 56 minutes, and 4.1 seconds.
History/Origin
The concept of the sidereal day has been used in astronomy for centuries to measure Earth's rotation relative to fixed stars, differing slightly from the solar day used in everyday timekeeping.
Current Use
Sidereal days are primarily used in astronomy and celestial navigation to track the positions of stars and other celestial objects accurately.
Day
A day is a unit of time representing the period of one complete rotation of the Earth on its axis, typically lasting 24 hours.
History/Origin
The concept of a day has origins in ancient civilizations observing the cycle of day and night. The 24-hour day was standardized in the modern era, with the division into hours dating back to ancient Egypt and further refined through the adoption of mechanical clocks.
Current Use
The day is used universally to measure time intervals, schedule activities, and organize daily life, with the 24-hour system being the standard in most countries worldwide.