English

Noun

sidereal year ‎(plural sidereal years)

1. The orbital period of the Earth; a measure of the time it takes for the Sun to return to the same position with respect to the stars of the celestial sphere. A sidereal year is about 20.4 minutes longer than the tropical year due to precession of the equinoxes.

Translations

See also

• mean solar day
• tropical year

External links

• sidereal year on Wikipedia.Wikipedia