The sidereal day is more constant and shorter than the solar day.

Question

Quizplus · Accepted Answer

The sidereal day is the time it takes for the Earth to rotate once around its axis relative to the fixed stars. It is more constant because it is not affected by the Earth's orbit around the sun, which causes the solar day to vary slightly in length throughout the year. The sidereal day is also shorter than the solar day, as it takes approximately 23 hours, 56 minutes, and 4 seconds to complete one rotation, while the solar day takes about 24 hours.

The Sidereal Day Is More Constant and Shorter Than the Solar