English Dictionary

solar day

名詞

(astronomy) one day of solar time, the time between successive noons; the time in which a planet such as Earth apparently rotates once around its axis, relative to the sun (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year)

日本語の意味

（天文学）太陽に基づいて定義される1日の周期。つまり、正午から次の正午までの経過時間で、地球の場合は平均して約24時間ですが、季節により若干変動する。

The length of a solar day varies slightly throughout the year due to Earth's elliptical orbit and axial tilt.

太陽日（正午から次の正午までの時間）の長さは、地球の楕円軌道と地軸の傾きにより、年間を通じてわずかに変化します。

意味（1）

(astronomy) one day of solar time, the time between successive noons; the time in which a planet such as Earth apparently rotates once around its axis, relative to the sun (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year)

solar days （ plural ）