transit tetany, transit recumbency definition of transit tetany, transit recumbency in the Free Online Encyclopedia.

transit, in astronomy, passage of a body across a meridian or passage of a small body across the visible disk of a larger one. (The passage of a large body across a smaller one is called an eclipse eclipse (ēklĭps`, ĭ–) [Gr.
..... Click the link for more information. or occultation occultation (ŏk'əltā`shən), in astronomy, eclipse of one celestial body by another, e.g.
..... Click the link for more information. .) All of the fixed stars transit the celestial meridian celestial meridian, vertical circle passing through the north celestial pole and an observer's zenith . It is an axis in the altazimuth coordinate system .
..... Click the link for more information. once daily; an observer can determine either his longitude longitude (lŏn`jĭt
..... Click the link for more information. or the sidereal time sidereal time (ST), time measured relative to the fixed stars; thus, the sidereal day is the period during which the earth completes one rotation on its axis so that some chosen star appears twice on the observer's celestial meridian .
..... Click the link for more information. by noting the time at which a given star transits his meridian and by referring to tables. Transits of small bodies across larger ones can be observed only within the bounds of the solar system. The innermost moons of Jupiter are so close to the planet that they transit it at every orbit. Of the planets, only Mercury and Venus, whose orbits lie inside the earth's orbit, can transit the sun. When such a transit occurs, the planet appears in a special solar telescope as a small black dot on the sun's disk. A solar transit can occur only when one of the two planets is in inferior conjunction conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun.
..... Click the link for more information. and at one of its nodes node, in astronomy, point at which the orbit of a body crosses a reference plane. One reference plane that is often used is the plane of the earth's orbit around the sun ( ecliptic ).
..... Click the link for more information. on the plane of the ecliptic. For Mercury, solar transit can occur only in May or November. The interval between November transits is 7, 13, or 46 years; May transits occur at intervals of 13 or 46 years. Exact timing of Mercury's transits have offered experimental confirmation of the theory of relativity relativity, physical theory, introduced by Albert Einstein, that discards the concept of absolute motion and instead treats only relative motion between two systems or frames of reference.
..... Click the link for more information. . For Venus, solar transit occurs in June or December. Currently, two transits take place within about 8 years of each other, with an interval of 52 1-2 or 60 1-2 years between pairs of transits. The next two solar transits of Venus will occur in June, 2004, and June, 2012. Venus's solar transits have been used in determining the astronomical unit astronomical unit (AU), mean distance between the earth and sun; one AU is c.92,960,000 mi (149,604,970 km). The astronomical unit is the principal unit of measurement within the solar system, e.g., Mercury is just over 1-3 AU and Pluto is about 39 AU from the sun.
..... Click the link for more information. .

transit

1. Astronomy

a. the passage of a celestial body or satellite across the face of a relatively larger body as seen from the earth

b. the apparent passage of a celestial body across the meridian, caused by the earth's diurnal rotation

2. Astrology the passage of a planet across some special point on the zodiac

transit [′trans·ət]

(astronomy)

A celestial body's movement across the meridian of a place. Also known as meridian transit.

Passage of a smaller celestial body across a larger one.

Passage of a satellite's shadow across the disk of its primary.

(engineering)

A surveying instrument with the telescope mounted so that it can measure horizontal and vertical angles. Also known as transit theodolite.

To reverse the direction of the telescope of a transit by rotating 180° about its horizontal axis. Also known as plunge.

(navigation)

A positive-fixing system employing low-orbit satellites which constantly emit continuous-wave signals; on the surface vehicle, the signals are received and the Doppler shift is recorded; position is determined by computation based on the shift.

(language)

TRANSIT - A subsystem of ICES.

[Sammet 1969, p.616].

transit (redirected from transit tetany, transit recumbency)

transit
(redirected from transit tetany, transit recumbency)