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...

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...

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...

Sidereus Nuncius (usually Sidereal Messenger, also Starry Messenger or Sidereal Message) is a short astronomical treatise (or pamphlet) published in Neo-Latin...

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...

details, see the article on Classical compass winds).[citation needed] The sidereal compass rose demarcates the compass points by the position of stars ("steering...

the sidereal year. Instead, they employ their versions of the Metonic cycle. However, since the Metonic cycle is not very accurate for sidereal years...

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...

Anti-sidereal time and extended-sidereal time are artificial time standards used to analyze the daily variation in the number of cosmic rays received...

must be the sidereal day, so the corresponding time unit must be a sidereal hour. This is confirmed by multiplying by the number of sidereal days in one...

currently less than the sidereal year and its duration is very close to the Julian year of 365.25 days. The Gaussian year is the sidereal year for a planet...

not the distinction between sidereal and tropical months) were first recognized in Babylonian lunar astronomy. The sidereal month is defined as the Moon's...

beginning of spring). However, the Hindu calendar year was based on the sidereal year (i.e. the movement of the sun relative to the stars), while the Western...

of the Earth's natural fluctuation of a solar day, and stellar day and sidereal day (using the celestial sphere) used for astronomy. In most countries...

 'Serpent-bearer'; astrological symbol ) has sometimes been suggested in sidereal astrology as a 13th astrological sign in addition to the 12 signs of the...

2020. "Sidereal Astrology Explained". Retrieved 23 February 2023. "Western Sidereal Astrology Is Real Astrology:". 28 November 2008. "Free Sidereal Birth...

sankrantis. Each Sankranti is marked as the beginning of a month in the sidereal solar calendars followed in South Indian states: Andhra Pradesh, Telangana...

elements from antiquity up until the present. In Western astrology and Sidereal astrology four elements are used: Fire, Earth, Air, and Water. In Western...

7 days. This is sometimes described as an inaccurate estimate of our modern sidereal period of 27.3 days, but using the ancient Indian calendar with Vedic months...

one complete rotation is 23 hours, 56 minutes, and 4.09 seconds – one sidereal day. The first experimental demonstration of this motion was conducted...

latitude sunspots in the 1850s and arrived at 25.38 days for the sidereal rotation period. Sidereal rotation is measured relative to the stars, but because the...

while reoccurring every sidereal day. The remaining small changes in the culmination period time from sidereal year to sidereal year is on the other hand...

that is the position of the Sun in the Earth's sky. If the sidereal year (such as in a sidereal solar calendar) is used instead of the solar year, then the...

on the/at its meridian (at its apparent highest point) 18.5 sidereal hours later. Sidereal hour angle, used in celestial navigation, is similar to right...

asteroid) has two definitions. The first one corresponds to the sidereal rotation period (or sidereal day), i.e., the time that the object takes to complete a...

The Tamil calendar (தமிழ் நாட்காட்டி) is a sidereal solar calendar used by the Tamil people of the Indian subcontinent. It is also used in Puducherry,...