equinoctial year
Noun: - The time for the Earth to make one revolution around the sun, measured between two successive vernal equinoxes. This is a specific astronomical year, also known as a tropical year, which tracks the cycle of the seasons.
The term "equinoctial year" is used in astronomy and precise timekeeping to define the seasonal cycle. - The length of an equinoctial year is approximately 365 days, 5 hours, 48 minutes, and 45 seconds. - Ancient calendars were often calibrated to the equinoctial year to keep agricultural festivals in the correct season.
- In Astronomical Context: The equinoctial year is fundamental for creating calendars that stay synchronized with the seasons, such as the Gregorian calendar.
- The discrepancy between the calendar year and the equinoctial year is why we have leap years.
- Tropical Year: A direct synonym for "equinoctial year."
- Solar Year: A more general term that can sometimes refer to the equinoctial year but may also refer to other solar-based year measurements.
- Sidereal Year: A different measurement, the time for the Earth to orbit the sun relative to the fixed stars, which is about 20 minutes longer than an equinoctial year.
- Tropical Year
Given its technical nature, "equinoctial year" does not have associated phrasal verbs or idioms. Key related concepts include: - Vernal Equinox: The point in time from which the equinoctial year is measured. - Precession: The slow change in the Earth's orientation that causes a very slight difference between various types of astronomical years over long periods.
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the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
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