Sidereal Definition & Meaning - Merriam-Webster
WEBApr 12, 2017 · The meaning of SIDEREAL is of, relating to, or expressed in relation to stars or constellations : astral.
Sidereal time - Wikipedia
WEBSidereal time ("sidereal" pronounced / s aɪ ˈ d ɪər i əl, s ə-/ sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers. Using sidereal time and the celestial coordinate system, it is easy to locate the positions of celestial objects in the night sky.
SIDEREAL | English meaning - Cambridge Dictionary
WEBSIDEREAL definition: 1. of or calculated by the stars 2. of or calculated by the stars. Learn more.
EarthSky | Sidereal time: What is it?
WEBJun 10, 2012 · A sidereal day measures the rotation of Earth relative to the stars rather than the sun. It helps astronomers keep time and know where to point their telescopes without worrying about where Earth...
英語「sidereal」の意味・読み方・表現 | Weblio英和辞書
WEBsidereal. 形容詞. 1. （ 時間の分 割に ついて ） 日々 の 星の 動きで 決定する. ( ( of divisions of time) determined by daily motion of the stars) sidereal time 恒星時. 2. 星 または 星座 の、 あるいは 、 星 または 星座 に関する. ( of or relating to the stars or constellations)
SIDEREAL Definition & Meaning | Dictionary.com
WEBadjective. of, relating to, or involving the stars. determined with reference to one or more stars. the sidereal day. sidereal. / sī-dîr ′ ē-əl /. Relating to the stars or constellations. …
SIDEREAL | definition in the Cambridge English Dictionary
WEBSIDEREAL meaning: 1. of or calculated by the stars 2. of or calculated by the stars. Learn more.
Sidereal time | Celestial Coordinates, Celestial Sphere
WEBsidereal time, time as measured by the apparent motion about the Earth of the distant, so-called fixed, stars, as distinguished from solar time, which corresponds to the apparent motion of the Sun. The primary unit of sidereal time is the sidereal day , which is subdivided into 24 sidereal hours, 1,440 sidereal minutes, and 86,400 sidereal seconds.
Sidereal - Definition, Meaning & Synonyms | Vocabulary.com
WEBSidereal is an adjective that first popped up in the 17th century, and stems from the Latin word sidereus, which means "star." Anything that's sidereal has something to do with stars and constellations. And if you measure the days and weeks by the movement of the stars across the sky, that's called sidereal astronomy or sidereal time.
Sidereal period | Definition & Facts | Britannica
WEBSidereal period, the time required for a celestial body within the solar system to complete one revolution with respect to the fixed stars—i.e., as observed from some fixed point outside the system. The sidereal period of a planet can be calculated if its synodic period (the time for it to return.
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