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词汇 sidereal month
释义

Definition of sidereal month in English:

sidereal month

noun
Astronomy
  • The time it takes the moon to orbit once around the earth with respect to the stars (approximately 271/4 days).

    〔天文〕恒星月

    Example sentencesExamples
    • During the sidereal months of Sagittarius and Capricorn, the Sun is nearest to the earth.
    • There are on average about 13.37 sidereal months in a tropical year.
    • In different Indian lunisolar calendars the lunar month is used, mixed with the sidereal month.
    • Thus, a lunar month is longer than a sidereal month by about 1/12 th of a month, or two-and-a-half days roughly.
    • How would the synodic and sidereal months differ if the moon orbited the Earth in the opposite direction?

Definition of sidereal month in US English:

sidereal month

noun
Astronomy
  • The time it takes the moon to orbit once around the earth with respect to the stars (approximately 271/4 days).

    〔天文〕恒星月

    Example sentencesExamples
    • During the sidereal months of Sagittarius and Capricorn, the Sun is nearest to the earth.
    • In different Indian lunisolar calendars the lunar month is used, mixed with the sidereal month.
    • How would the synodic and sidereal months differ if the moon orbited the Earth in the opposite direction?
    • There are on average about 13.37 sidereal months in a tropical year.
    • Thus, a lunar month is longer than a sidereal month by about 1/12 th of a month, or two-and-a-half days roughly.
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