Ancient cultures, including the Greeks, noticed the slow drift of equinoxes, leading to the identification of the precession of the Earth’s axis. How long is a year on other planets? - Astronomy Magazine
Other planets have vastly different "years" based on their distance from the Sun. For example, a year on Mercury is 88 Earth days, while a year on Neptune is 165 Earth years. 4. Other Planetary Years Mercury: 88 Earth days Venus: 225 Earth days Mars: 687 Earth days Jupiter: 12 Earth years Saturn: 29.4 Earth years Uranus: 84 Earth years Neptune: 165 Earth years 5. Historical Context
The time between two consecutive perihelion passages (the closest point to the sun) (approx. 365.2596365.2596 astronomical year
The tropical year is about 20 minutes shorter than the sidereal year due to the precession of Earth’s rotation axis .
There are several ways to define a "year," depending on what reference point is used for a full orbit: Ancient cultures, including the Greeks, noticed the slow
The Earth does not complete its orbit in an exact number of days.
days). It is slightly longer than the tropical year due to axial precession. For example, a year on Mercury is 88
An is the time it takes for Earth to complete one full revolution around the Sun, a duration that defines our seasons and differs slightly depending on the reference point used. While our civil calendar uses 365 or 366 days, the actual astronomical, or tropical year , is approximately 365.24219365.24219
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