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in astronomy, the angular distance between two points in the sky as measured from a third point. The elongation of a planet is usually measured as the angular distance from the sun to the planet as measured from the earth. When a planet lies on the line drawn from the earth to the sun, its elongation is 0° and is said to be in conjunctionconjunction,
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.
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. When a planet's elongation is 90°, it is in quadraturequadrature,
in astronomy, arrangement of two celestial bodies at right angles to each other as viewed from a reference point. If the reference point is the earth and the sun is one of the bodies, a planet is in quadrature when its elongation is 90°.
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. When its elongation is 180°, it is in oppositionopposition,
in astronomy, alignment of two celestial bodies on opposite sides of the sky as viewed from earth. Opposition of the moon or planets is often determined in reference to the sun.
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. Elongation is measured east (eastern quadrature) or west (western quadrature) from the sun. The superior planetssuperior planet,
planet whose orbit lies outside that of the earth. The superior planets are Mars, Jupiter, Saturn, Uranus, and Neptune.
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 can have elongations between 0° and 180°; the elongations of the inferior planetsinferior planet,
planet whose orbit lies inside that of the earth. There are two inferior planets, Mercury and Venus. They always seem to be close to the sun in the sky; the greatest elongation of Mercury is 28°, and that of Venus, 47°.
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 are limited by their proximity to the sun. The greatest elongation of Mercury is 28°, and of Venus, 47°.
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Elongations of superior and inferior planetclick for a larger image
Elongations of superior and inferior planet


(ee-long-gay -shŏn) The angular distance between the Sun and a planet, i.e. the angle Sun–Earth–planet, measured from 0° to 180° east or west of the Sun. It is also the angular distance between a planet and one of its satellites, i.e. the angle planet–Earth–satellite, measured from 0° east or west of the planet. An elongation of 0° is called conjunction, one of 180° is opposition, and one of 90° is quadrature (see illustration). When an inferior planet follows the Sun in its daily motion, appearing east of the Sun in the evening, it is in eastern elongation. When it precedes the Sun, appearing west of the Sun in the morning, it is in western elongation. The inferior planets, which cannot come to quadrature, reach positions of greatest elongation (GE). The GE for both eastern and western elongation varies from 18° to 28° (Mercury) and from 45° to 47° (Venus).

Collins Dictionary of Astronomy © Market House Books Ltd, 2006


(religion, spiritualism, and occult)

Elongation, in astrological parlance, is the maximum angular distance that Mercury and Venus travel from the Sun. Because the orbits of Mercury and Venus lie between Earth and the Sun, these two planets appear to always travel with the Sun, so that, from the position of Earth, Mercury is always within 28° of the Sun, and Venus always within 46°. Elongation also refers to the maximum apparent distance that a satellite travels from the body around which it moves (e.g., the maximum distance the Moon travels from Earth).

The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.


The difference between the celestial longitude of the moon or a planet, as measured from the earth, and that of the sun.
The extension of the envelope of a signal due to delayed arrival of multipath components.
The fractional increase in a material's length due to stress in tension or to thermal expansion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


A change in the form or shape of a body or material which is subjected to an external force.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Its wide range of force and elongation testing possibilities covers all known tensile test procedures and tensile values.
President Buhari had on Monday told members of the National Executive Council (NEC) of the party that the tenure elongation of Oyegun and others was illegal.
(1) Temperature field plays a decisive role in casing elongation and Christmas tree uplift.
"William Sheehan replies: Clearly, Venus is a special case, and it is only because its orbit is the most nearly circular of all the planets' that observers in the 1950s and 1960s (and presumably Schroter himself) were able to ignore, with relative impunity, the small discrepancy between the times of greatest elongation and dichotomy.
There were no relations detected between elongation of styloid process and gender [12].
TPO/PLA blend foils have been obtained by film extrusion with TPO as matrix material and PLA as dispersed phase to decrease the elongation at break of the foil.
We believe this is the key feature that differentiates this material from conventional silicone elastomers and is what accounts for the unprecedented elongation."
The elongation pattern of stalk is a sigmoidal model which arises from the variable growth rates of individual internode comprising the maize stalk (Morrison et al.
Test results for fineness, length, strength and elongation are summarized in Table 2.For 100% cotton yarn samples raw material was opened cleaned and mixed with the aid of MBO (mixing bale opener) Uniclean (B11) and then Mixing opener (MO).
The effects of plant growth regulators on the development of multiple shoot formation and elongation have been investigated for this species also.
The task is to consider the properties of forced oscillation of the first and second mass particles in a circular rough line with limited elongations, so the system becomes vibro-impact with one sided limited angular elongation.