period of time for the ecliptic longitude of the Sun to increase 360°
A tropical year is the time it takes for the Sun to complete one full cycle through Earth's sky, returning to the same position relative to the seasons. This measurement matters because it's used to keep our calendars aligned with Earth's seasonal changes throughout the year.
AI-generated from the Wikipedia summary — may contain errors.
A tropical year, or solar year (or tropical period), is the time that the Sun takes to return to the same position in the sky – as viewed from the Earth or another celestial body of the Solar System – thus completing a full cycle of astronomical seasons. For example, it is the time from vernal equinox to the next vernal equinox, or from summer solstice to the next summer solstice. It is the type of year used by tropical solar calendars.
The tropical year is one type of astronomical year and a particular orbital period. Another type is the sidereal year (or sidereal orbital period), which is the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars, resulting in a duration of 20 minutes and 24.7 seconds longer than the tropical year due to the precession of the equinoxes.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).