pargetidan, parget dâštan
1) (with preposition to) To be the property of.
M.E. belongen, from be- intensive prefix, + longen "to go," from O.E. langian "pertain to, to go along with;" akin to Du. belangen, Ger. belangen; of unknown origin.
Pargetidan, literally "to surround, to relate with" (on the model of L. pertinere "pertain," Skt. parigraha- "surrounding; relation to"), from parget "to hold, seize, take around," from par- "around," → peri-, + get "to take, sieze," as in Tâleši gate "to take," Târi gata, Sorxeyi, Lâsgardi, Semnâni, Šâhmerzâdi -git- "take, seize," variants of gereftan "take, hold," → concept.
mipargetad, parget dârad
If x is an → element of a → set S, then x belongs to S and this is written x ∈ S.
Third person present verb of → belong.
Fr.: longitude céleste
Angular distance to an object measured eastward along the → ecliptic from the → vernal equinox.
circle of longitude
1) A great circle of the celestial sphere, from the pole to the ecliptic
at right angles to the plane of the ecliptic.
Fr.: loi de Dulong et Petit
The product of the → specific heat and → atomic weight of most solid elements at room → temperature is nearly the same. In other words, specific heat is constant for a solid and independent of temperature. Experiment shows that at moderate temperatures this law is satisfied for → crystals with rather simple structure. However, the law fails for crystals with more complex structures. More specifically the law cannot explain the variation of specific heat with temperature. The specific heat drops to zero as the temperature approaches 0 K. This behavior is explained only with the quantum theory. → Debye model.
Named after Pierre L. Dulong (1785-1838) and Alexis T. Petit (1797-1820), French chemists, who proposed the law in 1819. They collaborated in several important investigations, including studies of thermal expansion of gases and of liquids and the specific heats of substances; → law.
Fr.: élongation est
The position of a planet when it can be seen in the western sky just after sunset.
→ eastern; → elongation.
Fr.: longitude écliptique
One of the two coordinates in the → ecliptic system; the angle measured eastwards along the ecliptic from 0° to 360°, with the origin at the → vernal equinox.
To draw out to greater length; lengthen; extend.
From L.L. elongatus "lengthened out," p.p. of elongare "to make longer, to remove to a distance," from → ex- "out" + longus "long;" PIE base *dlonghos- "long;" cf. Av. darəga-, darəγa- "long," drājištəm "longest;" Mod.Pers. derâz "long," dir "late; long;" Skt. dīrghá- "long (in space and time);" Gk. dolikhos "long;" P.Gmc. *langgaz (Ger. lang; O.N. langr; M.Du. lanc; Goth. laggs "long;" E. long).
DerâzidanDerâzeš "to elongate," from derâz "long," Mid.Pers. drâz "long;" Av. darəga-, darəγa- "long," drājištəm "longest;" PIE *dlonghos- "long," as above.
Made longer; long and narrow.
Past participle of → elongate.
madâr-e derâzidé, ~ kašidé
Fr.: orbite allongée
An → elliptical orbit with a high → eccentricity.
1) Increase in length per unit of original length.
Fr.: longitude galactique
In the → Galactic coordinate system, the angle between the → Galactic Center and the projection of the object on the → Galactic plane. Galactic longitude, usually represented by the symbol lII, ranges from 0 degrees to 360 degrees.
general precession in longitude
pišâyân-e harvin-e derežnâ
Fr.: précession générale en longitude
The secular displacement of the → equinox on the → ecliptic of date.
→ general; → precession; → longitude.
Fr.: longitude géocentrique
The same as → geodetic longitude.
→ geocentric; → longitude.
Fr.: longitude géodésique
The angle between the plane of the → geodetic meridian and the plane of of the geodetic meridian through the site of the → Airy transit circle at the Royal Greenwich Observatory.
greatest eastern elongation
bozorgtarin derâzeš-e xâvari
Fr.: plus grande élongation est
The Greatest → elongation of an inferior planet occurring after sunset.
Superlative of → great; → eastern; → elongation.
Fr.: plus grande élongationt
The largest → elongation of an inferior planet from the Sun. It may be → greatest eastern elongation or → greatest western elongation. The greatest elongation of Mercury is about 28°, and thus Mercury can only be observed 112 minutes after sunset or before sunrise. For Venus, it is about 47°, making it visible at most about 3 hours after sunset or before sunrise.
Superlative of → great; → eastern; → elongation.
greatest western elongation
bozorgtarin derâzeš-e bâxtari
Fr.: plus grande élongation ouest
The Greatest → elongation of an inferior planet occurring before sunrise.
Superlative of → great; → western; → elongation.
libration in longitude
Fr.: libration en longitude
A tiny oscillating motion of the → Moon arising from the fact that the Moon's orbit is not a precise circle but rather an → ellipse. Therefore, Moon is sometimes a little closer to the Earth than at other times, and as a result its → orbital velocity varies a bit. Since the Moon's rotation on its own axis is more regular, the difference appears as a slight east-west oscillation. Libration in longitude is the most significant kind of libration. It varies between about 4°.5 and 8°.1 because of gravitational perturbations in the Moon's orbit caused by the Sun.
1) Having considerable linear extent in space.
→ very-long-baseline interferometry (VLBI).
M.E. longe, O.E. lang, long, akin to O.H.G., Ger. lang "long," O.N. langr, M.Du. lanc, Goth. laggs "long," L. longus, → longitude.
Derâz "long," Mid.Pers. drâz "long;" O.Pers. darga- "long;" Av. darəga-, darəγa- "long," drājištəm "longest;" cf. Skt. dirghá- "lon (in space and time)."