Sidereal year and Sidereal day

Sidereal year noun - The time for the earth to make one complete revolution around the sun, relative to the fixed stars.

Sidereal day and sidereal year are semantically related in time measured by stars topic. In some cases you can use "Sidereal day" instead a noun phrase "Sidereal year".

Sidereal day noun - The time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day.

Sidereal year and sidereal day are semantically related in time measured by stars topic. You can use "Sidereal year" instead a noun phrase "Sidereal day".