tähtäinvuonna
Tähtäinvuonna, also known as the "star year" or "astronomical year," refers to the time it takes for the Earth to complete one full orbit around the Sun relative to the fixed stars. This period is distinct from the tropical year, which measures the time between successive vernal equinoxes, and is slightly longer due to the gradual precession of the equinoxes.
The tähtäinvuonna is approximately 365.25636 days long, or about 365 days, 6 hours, 9 minutes, and 9.5
Unlike the tropical year, which forms the basis of the Gregorian calendar, the tähtäinvuonna is not directly
In Finnish astronomy, the term *tähtäinvuonna* is occasionally used to emphasize the distinction between the orbital