solar day

== English == === Pronunciation === === Noun === solar day (plural solar days) (astronomy) One day of solar time; the time in which a planet such as Earth apparently rotates once around its axis relative to the Sun; the time taken for the Sun to seem to be in the same place in the sky twice (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year) ==== Derived terms ==== mean solar day ==== Related terms ==== solar time ==== Translations ==== ==== See also ==== sidereal day stellar day