Sidereal Hour (Noun)
Meaning
1/24 of a sidereal day.
Classification
Nouns denoting time and temporal relations.
Examples
- A sidereal hour is the time it takes the Earth to rotate 15 degrees relative to the fixed stars, equivalent to 1/24 of a sidereal day.
- The sidereal hour is used in astronomy to keep track of the position of celestial objects in the sky.
- There are 24 sidereal hours in a sidereal day, which is approximately 23 hours and 56 minutes in solar time.
- A sidereal hour is slightly shorter than a solar hour due to the Earth's slightly ellipsoidal shape and its orbit around the Sun.
- The sidereal hour is an important unit of time in astronomy, as it allows astronomers to accurately track the position of stars and other celestial objects.