太たい陽よう日じつ

noun

solar day

Astronomical term: the time it takes for the Sun to return to the same position in the sky, about 24 hours.

• 太たい陽よう日じつは恒こう星せい日じつより約やく4分ぷん長ながい。

  A solar day is about 4 minutes longer than a sidereal day.