English Dictionary

sidereal day

名詞

(astronomy) One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

日本語の意味

恒星日：天文学において、地球が自転軸を一回転するのに要する時間（約23時間56分4秒）を指す。

A sidereal day is slightly shorter than a solar day, which affects precise astronomical observations.

恒星日は太陽日よりわずかに短く、精密な天文観測に影響を与えます。

意味（1）

(astronomy) One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

意味（2）

(astronomy) The rotational period of Earth; the time in which Earth rotates around its axis 360 degrees.

sidereal days （ plural ）