Definition of Sidereal. Meaning of Sidereal. Synonyms of Sidereal

Here you will find one or more explanations in English for the word Sidereal. Also in the bottom left of the page several parts of wikipedia pages related to the word Sidereal and, of course, Sidereal synonyms and on the right images related to the word Sidereal.

Definition of Sidereal

Sidereal
Sidereal Si*de"re*al, a. [L. sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.] 1. Relating to the stars; starry; astral; as, sidereal astronomy. 2. (Astron.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day. Sidereal clock, day, month, year. See under Clock, Day, etc. Sideral time, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.

Meaning of Sidereal from wikipedia

- Sidereal time ("sidereal" pronounced /saɪˈdɪəriəl, sə-/ sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers. Using sidereal...
- up sidereal in Wiktionary, the free dictionary. Sidereal, meaning "of the stars", may refer to: Sidereal time Sidereal day Sidereal month Sidereal year...
- In astrology, sidereal and tropical are terms that refer to two different systems of ecliptic coordinates used to divide the ecliptic into twelve "signs"...
- A sidereal year (/saɪˈdɪəri.əl/, US also /sɪ-/; from Latin sidus 'asterism, star'), also called a sidereal orbital period, is the time that Earth or another...
- celestial objects in general, the orbital period typically refers to the sidereal period, determined by a 360° revolution of one body around its primary...
- minutes and 11.5 seconds, the sidereal month is about 2.2 days shorter than the synodic month. Thus, about 13.37 sidereal months, but about 12.37 synodic...
- calendar of this type is called a sidereal solar calendar. The mean calendar year of such a calendar approximates the sidereal year. Leaping from one lunation...
- details, see the article on classical comp**** winds).[citation needed] The sidereal comp**** rose demarcates the comp**** points by the position of stars ("steering...
- distinguished from the sidereal day, which is one complete rotation in relation to distant stars and is the basis of sidereal time. In the case of a tidally...
- local meridian (local hour angle, LHA) or from the first point of Aries (sidereal hour angle, SHA). The hour angle is paired with the declination to fully...