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Glite Dictionary
astronomical year

astronomical year

5.8
The time the Earth takes to go once around the Sun from one spring equinox to the next
  • noun
  • /ˌæstrəˈnɑːmɪkəl jɪr/
  • Specialized
translation icon : año astronómico
  • The difference between a calendar year and an astronomical year can affect the timing of seasons.

Examples

  • Ancient astronomers used the astronomical year to calculate the calendar.

  • An astronomical year lasts about 365.24 days.

  • The length of an astronomical year is approximately 365.2422 days.

  • The astronomical year is crucial for understanding seasonal changes.

  • The astronomical year lasts about 365.24 days as the Earth makes its orbit around the Sun.

  • Scientists study the astronomical year to better understand the changing seasons.

  • In astronomy classes, students learn that the astronomical year is defined by the Earth's revolution around the Sun.

Synonyms

solar year
vsastronomical year
1 3.7

The time it takes the Earth to go once around the Sun, about 365 days

uses exact phrasing of measurement from one vernal equinox to the next
equinoctial year
vsastronomical year
  • Specialized
8.6

The time Earth takes to go from one spring equinox to the next, about 365.24 days

is the same measurement stated without that numeric precision
tropical year
vsastronomical year
  • Specialized
6.7

Time Earth takes to go around the Sun from one spring equinox to the next

matches that vernal equinox measurement but omits the rounded day figure

Surface Forms

astronomical year singular
astronomical years plural

Morphology

astronomical + year

The phrase combines 'astronomical' (relating to astronomy) and 'year' (a period of orbit), so a learner who knows both words can infer it denotes a type of year defined by astronomical/orbital criteria rather than a calendar year. However, the precise technical definition (measured from one vernal equinox to the next and the exact fractional days) is specialized and not fully predictable from the constituents, so full understanding requires domain knowledge.

Etymology

Astronomical year comes from early sky watchers who measured a 'year' by the Sun and stars making one full trip as the Earth moved around the Sun. That's why it means the time the Earth takes to go once around the Sun.