An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 471
Big Dipper
  هفت برادران، هفتورنگ، چمچه‌ی ِ بزرگ   
haft barâdarân (#), haftowrang (#), camce-ye bozorg (#)

Fr.: Grand Chariot   

A group of seven stars, an → asterism, lying inside the Northern constellation → Ursa Major. They are: → Dubhe, → Merak, → Phad, → Megrez, → Alioth, → Mizar, and → Alkaid. The group is also known as the Plough in Great Britain.

big; dipper a popular U.S. name for the asterism known in Britain as The Plough or Charles' Wain, from dip O.E. dyppan "immerse," from P.Gmc. *dupjanan.

Haft barâdarân "the seven brothers," from haft "seven" (Mid.Pers. haft, Av. hapta, cf. Skt. sapta, Gk. hepta, L. septem, P.Gmc. *sebun, Du. zeven, O.H.G. sibun, Ger. sieben, E. seven; PIE *septm) + barâdarân, plural of barâdar "brother" (Mid.Pers. brad, bardar, O.Pers./Av. brātar-, cf. Skt. bhrátar-, Gk. phrater, L. frater, P.Gmc. *brothar; PIE base *bhrater- "brother").
Haftowrang, Mid.Pers. haptôiring, from Av. haptôiringa- "with seven marks," from hapto- "seven,"as above, + iringa- "mark," cf. Skt. linga- "mark, token, sign."
Camcé "a spoon, ladle; a wooden bowl or cup;" bozorg "big, large."

big grain
  دانه‌ی ِ بزرگ   
dâne-ye bozorg

Fr.: gros grain   

A type of → interstellar dust grains with a size ranging from 150 to 1000 Å. Big grains consist of graphite and silicates. They are in → thermal equilibrium with the radiation field and their emission can be described by a modified → blackbody radiation following from → Kirchhoff's law.

big; → grain.

Big Rip
  مه‌گسست   
meh gosast

Fr.: big rip   

A cosmological hypothesis regarding the ultimate fate of the → Universe whereby in a far future galaxies and stellar systems would be torn apart due to the → accelerating expansion of the Universe depending on the kind of the → dark energy content of the Universe. According to this hypothesis, after the disruption of galaxies, stars, and planets even atoms might not be able to withstand the internal force of the expansion imposed by the dark energy.

big; M.E. rippen, origin obscure, cf. Frisian rippe "to tear, rip," M.Du. reppen, rippen "to pull, jerk," Swed. reppa, Dan. rippe "to tear, rip."

Meh "large, big," see under → big; gosast stem of gosastan "to tear, cut, break," from Mid.Pers. wisistan "to break, split," Av. saed-, sid- "to split, break," asista- "unsplit, unharmed," Skt. chid- "to split, break, cut off," PIE base *skei- "to cut, split," cf. Gk. skhizein "to split," L. scindere "to split," Goth. skaidan, O.E. sceadan "to divide, separate."

bijection
  دوشانش   
došâneš

Fr.: bijection   

A → mapping  f from a → set  A onto a set B which is both an → injection and a → surjection. More explicitly, for every element b of B there is a unique element a of A for which f(a) = b. Also known as → bijective mapping.

From bi- + → injection.

bijective
  دوشانی   
došâni

Fr.: bijectif   

Of or pertaining to a → bijection.

bi-; → injection.

bijective mapping
  همتایش ِ دوشانی   
hamtâyeš-e došâni

Fr.: application bijective   

Same as → bijection.

bijective; → mapping.

bijective morphism
  ریخت‌شناسی ِ دوشانی   
rixtšenâsi-ye došâni

Fr.: morphisme bijectif   

Same as → isomorphism.

bijective; → morphism.

bimodal star formation
  دیسش ِ دومدی ِ ستارگان   
diseš-e domodi-ye setâregân

Fr.: formation bimodale d'étoile   

A concept of star formation in which high and low mass stars form at different interstellar locations.

Bimodal, from → bi- + modal, from → mode; → star, → formation.

Diseš, → formation; domodi, from dobi- + modi, from → mode; setâregân "stars."

bin
  ۱) باوین؛ ۲) باوینیدن   
1) bâvin; 2) bâvinidan

Fr.: 1) bin; 2) binner   

1a) General:A box or enclosed space for storing grain, coal, or the like.
1b) Electronics: In a → CCD detector, a square or rectangular group of adjacent → pixels used collectively to transport the → electron charges.
1c) In a statistical → histogram, the range of → distribution → intervals. The bin widths (or the number of bins) affect a histogram.
2) To place in a → bin; to create → binning.

M.E. binne, O.E. binn(e) "manger, crib," perhaps from O.Celt. *benna, akin to Welsh benn "a cart, especially one with a woven wicker body." The same Celtic word seems to be preserved in It. benna "dung cart," Fr. benne "a sort of box for transporting materials, especially in mines," Du. benne "large basket," from L.L. benna.

Bâvin "a basket, more precisely a small basket which contains the cotton to be spun;" bâvinidan infinitive from bâvin.

binarity
  درینی   
dorini

Fr.: binarité   

The quality or condition of being binary.

binary; → -ity.

binary
  درین، دودویی   
dorin, dodoyi (#)

Fr.: binaire   

General: Characterized by or consisting of two parts or components.
Math.: Of or relating to a system of numeration having 2 as its base.
Astro.: Physically associated pair of astronomical objects.

Binary, from L.L. binarius, from bini "two-by-two," from bis "twice, two times;" cf. Av. biš- "twice," bi- "two," Mod.Pers. do "two," PIE *dwo- "two."

Dorin, from Mid.Pers. dorin "double, pair," from do (Av. dva-, Skt. dvi-, Gk. duo, L. duo, E. two, Der. zwei, Fr. deux) "two" + rin "time, turn."
Dodoyi "two-by-two," from do, → two.

binary arithmetic
  حساب ِ درین، ~ دودو‌یی   
hesâb-e dorin, ~ dodoi (#)

Fr.: arithmétique binaire   

A system of calculation in which the only numerals used are 0 and 1. All the real numbers are represented in terms of powers of 2.

binary; → arithmetic.

binary asteroid
  سیارک ِ درین   
sayyârak-e dorin

Fr.: astéroïde binaire   

A member of a population of double objects in the main → Asteroid Belt or the → Kuiper Belt which are gravitationally bound together. So far about 200 such binary systems have been identified, while their number is increasing. 243 Ida was the first binary asteroid to be discovered during the Galileo spacecraft flyby in 1993. Other examples are → Antiope and Kalliope in the main belt and QG298 in the Kuiper Belt. The importance of these objects resides in the fact that systems with well measured orbital parameters allow the total mass to be estimated. If the sizes of the components are known then their densities can be accurately calculated. Density is an important parameter since it yields information about composition and internal structure.

binary; → asteroid.

binary black hole
  سیه‌چال ِ درین   
siyah câl-e dorin

Fr.: trou noir binaire   

A → binary system consisting of two → black holes in close orbit around each other. Same as → black hole binary.

binary; → black; → hole.

binary digit (bit)
  رقم ِ درین، ~ دودو‌یی، بیت   
raqam-e dorin, ~ dodoi, bit

Fr.: chiffre binaire   

Either of the digits 0 or 1, used in the → binary number system.

binary, → digit.

binary galaxy
  کهکشان ِ درین   
kahkašân-e dorin

Fr.: galaxie binaire   

A pair of galaxies in orbit around each other.

binary; → galaxy.

Kahkašân, → galaxy; dorinbinary.

binary number system
  راژمان ِ عددهای ِ درینی   
râžmân-e adadhâ-ye dirini

Fr.: système des nombres binaires   

A → numeral system that has 2 as its base and uses only two digits, 0 and 1. The positional value of each digit in a binary number is twice the place value of the digit of its right side. Each binary digit is known as a bit. The decimal numbers from 0 to 10 are thus in binary 0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, and 1010. And, for example, the binary number 111012 represents the decimal number (1 × 24) + (1 × 23) + (1 × 22) + (0 × 21) + (1 × 20), or 29. In electronics, binary numbers are the flow of information in the form of zeros and ones used by computers. Computers use it to manipulate and store all of their data including numbers, words, videos, graphics, and music.

binary; → number; → system.

binary operation
  آپارش ِ درین   
âpâreš-e dorin

Fr.: opération binaire   

A mathematical operation that combines two numbers, quantities, sets, etc., to give a third. For example, multiplication of two numbers is a binary operation.
A binary operation * on a set S is → commutative if a * b = b * a for all a, bS.
A binary operation * on a set S is → associative if (a * b) * c = a * (b * c) for all a, b, cS.

binary; → operation.

binary pulsar
  پولسار ِ درین، تپار ِ ~   
pulsâr-e dorin, tapâr-e ~

Fr.: pulsar binaire   

A pulsar in a → binary system, the companion of which often being a → neutron star or a → white dwarf. The only known binary system with two pulsars components is the → double pulsar. As of 2010 about 70 binary pulsars have been identified. They are ideal laboratories for testing and studying the effects predicted by → general relativity, such as → spin precession, → Shapiro time delay, and → gravitational waves. The prototype, called PSR 1913+16, was discovered in 1974 by Russell A. Hulse and Joseph H. Taylor, Jr., who received the Nobel Prize for Physics in 1993. → Hulse-Taylor pulsar.

binary; → pulsar.

binary star
  ستاره‌ی ِ درین   
setâre-ye dorin

Fr.: étoile binaire   

Two stars gravitationally bound to each other, so that they revolve around their common center of gravity. → double star; → spectroscopic binary.

binary; → star.

Setâré, → star; dorin, → binary.

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