An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13046 Search : far
astrodynamics
  اخترتوانیک   
axtartavânik

Fr.: astrodynamique   

The science dealing with the motion of satellites, rockets, and spacecrafts. It uses the principles of celestial mechanics.

Astrodynamics, from → astro- "star" + → dynamics.

Axtartavânik, from axtar, → astro-, + tavânik, → dynamics.

astrogeology
  اخترزمین‌شناسی   
axtarzaminšenâsi (#)

Fr.: astrogéologie   

A science concerned with the geology of solid bodies in the Solar system, such as planets, satellites, asteroids, and meteorites.

Astrogeology, from Gk. → astro- "star" + → geology.

Axtarzaminšenâsi, from axtar, → star, → + zaminšenâsi, → geology.

astrograph
  اخترنگار   
axtarnegâr (#)

Fr.: astrographe   

A photographic instrument with great light gathering power which is used to photograph a large field in a single exposure.

Astrograph, from → astro- + → graph.

Axtarnegâr, from axtar, → astro-, + -negâr, → -graph.

astrolabe
  اسطرلاب   
ostorlâb (#)

Fr.: astrolabe   

An ancient instrument for solving problems relating to time and the position of the Sun and stars in the sky. It had many uses, including telling time during the day or night, finding the time of sunrise and sunset and, thus, the length of the day, and locating celestial objects in the sky. It was widely used until replaced by the → sextant. The → planispheric astrolabe, which is the most common type of the instrument, is typically made up of a graduated disk hanging vertically, which is rotated so that it can be directed to the star chosen. The local time can thus be read from the face of the astrolabe, and different tables, at various latitudes, can be used. More specifically, a planispheric astrolabe is made up of the following main components: → mater, → tympanum, → rete, → alidade, → throne, → limb, → pin, → horse, → front, and → back. The astrolabe was invented by Greeks, and some historians have attributed it to Hipparchus (c190-c120 BC). Modern, sophisticated versions (such as → prismatic astrolabe and → Danjon astrolabe), are used for high precision measurements of star positions. See also → particular astrolabe, → spherical astrolabe, and → universal astrolabe.

M.E., from O.Fr. astrelabe, from M.L. astrolabium, from Gk. astrolabos (organon) "star taking (instrument)," from astron "star," → astro- + lambanein "to take."

Ostorlâb, from Ar. usturlab, from Gk. astrolabos, as above.

astrologer
  اخترگو   
axtargu (#)

Fr.: astrologue   

One who practices → astrology; one who professes to foretell events by the aspects and situation of the stars.

Agent noun from → astrology.

Axtargu, a classical term used by e.g. Jalâleddin Rumi (Mowlavi), 13th century poet, → astrology.

astrology
  اخترگویی   
axtarguyi (#)

Fr.: astrologie   

A → pseudoscience based on the belief that the apparent positions and → aspects of a small number of celestial bodies influence the course of human life and terrestrial events. Although the Sun and Moon have a gravitational influence on Earth, there is no known force that can cause celestial bodies to affect human affairs in the way claimed by → astrologers. Generally speaking, astrology is baseless and incoherent. In the astrological belief the influence of celestial bodies does not depend upon their distance from Earth, but on their positions and apparent angular separations. Outer planets can have a similar degree of influence as the inner planets. As a consequence, the billions of planets in our Galaxy and in billions of other galaxies should also influence us, and logically the effect of those planets must overwhelm any influence of the planets we see. Nevertheless astrologers do not care, and this fact makes astrological deductions absurd even in their scheme. Historically, the planets → Uranus, → Neptune, and → Pluto were not used in astrological predictions. They were added from the 18th century onward, after their discovery. Now that Pluto is disqualified as a planet, will astrologers remove it from their theories? If the answer is negative, they must logically include the numerous other similar → dwarf planets (such as → Charon, → Quaoar, → Sedna) residing in the → Kuiper belt. In brief, astrology is a superstition chiefly based on ignorance and man's need for mental contentment.

astro-; → -logy.

Axtarguyi, literally "star-telling," from axtar "star," → astro- + guyi verbal noun from goftan "to tell, speak, talk;" Mid.Pers. guftan "to say, tell, utter;" O.Pers. gaub- "to say."

astrometric binary
  درین ِ اخترسنجیک   
dorin-e axtarsanjik

Fr.: binaire astrométrique   

A binary star in which the presence of an unresolved companion is revealed by small oscillations in the movement of the visible component caused by the gravitational influence of the unseen component.

astrometry; → binary.

astrometry
  اخترسنجی   
axtarsanji

Fr.: astrométrie   

The precise measurement of the positions and motions of → astronomical objects.

Astrometry, from → astro- "star" + → -metry "measuring."

Axtarsanji, from axtar, → astro-, + -sanji "measuring."

astronaut
  فضانورد، کیهان‌نورد   
fazânavard (#), keyhânnavard (#)

Fr.: astronaute, cosmonaute   

A person trained to pilot, navigate, or otherwise participate as a crew member of a spacecraft.

Astronaut, from Gk. → astro- "star" + nautes "sailor," from naus "ship" (cognate with Mod.Pers. nâv "ship;" Av./O.Pers. *nāv-, O.Pers. nāviyā- "fleet;" Skt. nau-, nava- "ship, boat;" Gk. naus, neus, L. navis; PIE *nāu- "ship").

Fazânavard, from Ar. fazâ "space" + navard agent noun from navardidan "to travel, walk, pass by and over."
Keyhânnavard, from keyhân "cosmos" + navard.

astronautics
  فضانوردی، کیهان‌نوردی   
fazânavardi (#), keyhânnavardi (#)

Fr.: astronautique   

The science and technology of space flight, including the building and operation of space vehicles.

astronaut.

astronomer
  اخترشناس   
axtaršenâs (#)

Fr.: astronome   

One who specializes in astronomy. → professional astronomer, → amateur astronomer.

Astronomer, from → astronomy + → -er.

Axtaršenâs has a long history in Persian; it is abundantly used by Ferdowsi (A.D. 950-1020) in his great work Šâhnâmé (Shahnameh); from axtar "star" → astro- + šenâs contraction of šenâsandé "expert, knowlegeable, skilled," from šenâxtan "to know, to recognize." → astronomy.

astronomical
  اخترشناختی، اخترشناسیک، اختری   
axtaršenâxti, axtaršenâsik, axtari (#)

Fr.: astronomique   

Of or relating to → astronomy.
In non astronomical contexts, of enormous magnitude; immense.

Astronomical, from L. astronomic(us), → astronomy + → -ic, + → -al adj. suffix.

Axtaršenâxti, from axtaršenâxt, variant of axtaršenâsi, → astronomy + -i adj. suffix.
Axtaršenâsik, from axtaršenâsi, → astronomy + re-introduced Mod.Pers. suffix -ik, → -ics.

astronomical clock
  ساعت ِ اخترشناسیک   
sâ'at-e axtaršenâsik

Fr.: horloge astronomique   

A precise pendulum clock with separate dials for seconds, minutes, and hours. It was originally used by astronomers to calculate astronomical time.

astronomical; → clock.

astronomical constant
  پایا‌ی اخترشناسیک، ~ اخترشناختی   
pâyâ-ye axtaršenâsik, ~ axtaršenâxti (#)

Fr.: constante astronomique   

A precisely measured fundamental quantity in astronomy, such as the → solar parallax, the → constant of aberration, and the → obliquity of the ecliptic.

astronomical; → constant.

astronomical coordinates
  هماراها‌ی اخترشناسیک، ~ اخترشناختی   
hamârâhâ-ye axtaršenâsik, ~ axtarsršnâxti (#)

Fr.: coordonnées astronomiques   

Values in a reference system used to relate the position of a body on the celestial sphere.

astronomical; → coordinates.

astronomical horizon
  افق ِ اخترشناسیک   
ofoq-e axtaršenâsik

Fr.: horizon astronomique   

The intersection of a plane perpendicular to the radius of the Earth through the observer's eye with the celestial sphere. Same as → true horizon. Because the → celestial sphere has an infinite radius, two observers at different heights above sea level, but placed on the same vertical line, have the same astronomical horizon. Because of → dip of the horizon, the astronomical horizon always lies above the → sea horizon. But on land it is usually hidden by trees, hills, and buildings which determine the observer's → apparent horizon.

astronomical; → horizon.

astronomical instrument
  سازال ِ اخترشناسیک   
sâzâl-e axtaršenâsik

Fr.: instrument astronomique   

A device used to observe and study → astronomical objects.

astronomical; → instrument.

astronomical latitude
  ورونای ِ اخترشناسیک   
varunâ-ye axtaršenâsik

Fr.: latitude astronomique   

The angle between the → equatorial plane and the true → vertical at a point on the surface.

astronomical; → latitude.

astronomical object
  بر‌آخت ِ اخترشناسیک، ~ اختری   
barâxt-e axtaršenâsik, ~ axtari

Fr.: objet astronomique   

A naturally occurring physical entity or association that lies beyond the Earth's atmosphere and can be studied observationally. In other words, a gravitationally bound structure that is associated with a position in space, but may consist of multiple independent astronomical objects. A list of astronomical objects includes → planets, → asteroids, → comets, → stars, → nebulae, galaxies (→ galaxy), → galaxy clusters, → pulsars, and → black holes. Note that → celestial body, → celestial object, and → heavenly body are less technical terms for these entities.

astronomical; → object.

astronomical observatory
  نپاهشگاه ِ اخترشناسیک، ~ اخترشناختی   
nepâhesgâh-e axtaršenâsik, ~ axtaršenâxti

Fr.: observatoire astronomique   

A building, place, or institution designed and equipped for making → observations of astronomical phenomena.

astronomical; → observatory.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara arc Ari arr Asi ass ast ast asy atm ato att aut ave axi Bab bal ban bar bar bea Bel Bes bia Big bin bin bip Bla bla bli blu Boh Bon bos Bou bra bri bro bur cal cal can Cap car Car cat Cau cea Cen cen cha Cha cha che chi chr cir cir civ cla clo clo CMB coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cop Cor CoR cor cos cos Cou cou CP- cre cri cro cub cur cya Cyg dan dar dau de- deb dec dec dee def deg del den den dep des deu dew dia dif dif dih dip dir dis dis dis dis dis diu doc dop dou DQ dry dus dwa dyn Dys Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext eye fac fal Far fed Fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub Hul Huy hyd hyd hyl hyp ice ide ima imm imp imp inc ind ind ine inf inf inf inh inn ins ins int int int int int int int int inv ion ion Irr iso iso iso Jal JHK Jul jur Kel Kep kin kne L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat Max mea mec mel Mer Mes met met met mic mid Mil min mir mix mod mod mol mon mor mov mul muo mys nan nat Nav nec nep neu new New NGC Noa nom non non nor not nuc nuc num nyc obj obs obs oce odd OH Omi Oor ope opt opt opt orb ord Ori ort osc out ove oxi pai pan par Par Par par pas pea Pen per per per per Per per pha phl pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre pre pri pri pro pro pro pro pro pro pro pse pul pur qua qua qua qua qui rad rad rad rad rad rad raf ran rar ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret rev ric rig rin roc ROS rot Rox rus Sad sal sat sca sca Sch sci scy sec sec see sel sem sen Ser sex Sha she sho sid sig sil sim sin siz sle SMA SNR Sof sol sol sol sol sou Sou spa Sp spe spe spe sph spi Spi spr sta sta sta sta sta ste ste ste sto str str Sty sub sub suc sun sup sup sup sup sur Swa syn syn tac tas tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru tum tur TY Typ ult una und uni uni uno upp urg UX Van var veg vel ver vib vio vir vis Voi vow wan wat wav WC wea wel whi Wil wir WNh wor X-r yel ytt zer zon > >>