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: 13 Search : ball
ball
  توپ، گوی   
tup (#), guy (#)

Fr.: boule, balle, ballon   

A spherical or approximately spherical body, either solid or hollow.

From M.E. bal, balle, from O.Fr.; cf. O.H.G. ballo, Ger. Ball; PIE root *bhel- "to blow, swell."

Tup "ball," initially "clmup, aggregation, parcel, group" (tup tup "many"); Tabari tupa "compressed, assembled," tuppi "round;" Kurd. top "ball," topâl "round;" guy, → globe.

ball lightning
  گوی ِ آذرخش   
gu-ye âzaraxš (#)

Fr.: foudre en bulle   

A rare form of lightning occurring as a bright red globe observed floating or moving through the atmosphere close to the ground. It usually is seen shortly before or after, or during, a → thunderstorm. Its duration varies from a few seconds to a few minutes. See also → Saint Elmo's fire.

ball; → lightning.

ballistic
  پرتابیک   
partâbik (#)

Fr.: balistique   

Of or relating to → ballistics.

ballistic missile
  موشک ِ پرتابیک   
mušak-e partâbik (#)

Fr.: missile balistique   

A missile that after being launched and guided in the early part of its flight, travels unpowered in a ballistic trajectory.

ballistic; → missile.

ballistic panspermia
  پان‌دانه‌وری ِ پرتابیک   
pân-dâne-vari-ye partâbik

Fr.: panspermie balistique   

Transfer of microbes and biochemical compounds from a planet to another due to meteoric impacts. Debris being knocked off a planet like Mars can reach escape velocity and enter the atmosphere of another planet with passenger micro-organisms intact.

ballistic; → panspermia.

ballistic trajectory
  ترایش ِ پرتابیک   
tarâyeš-e partâbik

Fr.: trajectoire balistique   

A curved path followed by an unpowered object that is being acted upon only by gravitational forces and the friction of the medium through which it moves.

ballistic; → trajectory.

ballistic wave
  موج ِ پرتابیک   
mowj-e partâbik

Fr.: onde balistique   

Audible disturbance or wave caused by the compression of air ahead of a projectile in flight.

ballistic; → wave.

ballistics
  پرتابیک، پرتابشناسی   
partâbik (#), partâbšenâsi (#)

Fr.: balistique   

The science of the motion and behavior of → projectiles. The study of the functioning of firearms.

From L. ballista "ancient military machine for hurling stones," from Gk. ballistes, from ballein "to throw," from PIE *gwelH1- "to throw;" cf. Pers. garzin "arrow;" Av. niγr- "to throw down;" Khotanese (+ *abi-, *ui-) bīr- "to throw, sow;" Proto-Iranian *garH- "to throw."

Partâbik, from partâb "a throw, an arrow that flies far," partâbidan "to throw," + -ik, → -ics; partâbšenâsi, from partâb + -šenâsi, → -logy.

balloon astronomy
  اخترشناسی با بالون، بالون-اخترشناسی   
axtaršenâsi bâ bâlon, bâlon-axtaršenâsi

Fr.: astronomie en ballon   

A branch of modern astronomy in which balloons are used to carry telescopes and instruments to high altitudes (up to 50 km) for observation.

Balloon, from Fr. ballon, from It. dialectal ballone, augmentative of balla, ball, from P.Gmc. *ball-, from PIE *bhel- "to blow, swell". → astronomy.

Axtaršenâsi, → astronomy; bâlon, from Fr. ballon.

balloon-borne telescope
  دوربین ِ بالون-برد، تلسکوپ ~   
durbin-e bâlon-bord, teleskop-e ~

Fr.: télescope porté par ballon   

A remotely guided or automatic telescope carried to high altitudes by a balloon.

balloon astronomy; borne "a past participle of bear," from O.E. beran "bear, bring, wear," from P.Gmc. *beranan (O.H.G. beran, Goth. bairan "to carry"), from PIE root *bher-; "to carry;" compare with Av./O.Pers. bar- "to bear, carry," bareθre "to bear (infinitive)," bareθri "a female that bears (children), a mother," Mod.Pers. bordan "to carry," Skt. bharati "he carries," Gk. pherein, L. fero "to carry." → telescope.

balloon astronomy. Bord in bâlon-bord "borne, carried," from Mod.Pers. bordan "to bear, carry," as explained above. Durbin, → telescope.

dirty iceball model
  مدل ِ گلوله‌ی ِ یخ   
model-e golule-ye yax

Fr.: modèle de la boule de glace sale   

A model for a → cometary nucleus proposed by Fred Whipple (1950-51), according to which the nucleus is a solid body (a few kilometers across) made up of various → ices (→ frozen water, → methane, → ammonia, → carbon dioxide, and → hydrogen cyanide) in which → dust is embedded. Dust particles are liberated when the ices vaporize as the → comet approaches the → Sun, and they get blown away by → solar radiation pressure, often forming impressive, gently curved → dust tails.

dirty; → ice; → ball; → model.

fireball
  تشگوی، آذرگوی   
tašguy (#), âzarguy (#)

Fr.: boule de feu   

A → meteor that is brighter than the brightest planets, i.e. with an apparent magnitude of -5 or greater. Fireballs are often followed by → meteorite falls. Also called → bolide.

From → fire + ball, from O.E., from O.N. bollr "ball," from P.Gmc. *balluz (cf. O.H.G. ballo, Ger. Ball), from PIE base *bhel- "to swell."

Tašguy, from taš "fire," variant of âtašfire + guy "ball, sphere," variants golulé, gullé, goruk, gulu, gudé (cf. Skt. guda- "ball, mouthful, lump, tumour," Pali gula- "ball," Gk. gloutos "rump," L. glomus "ball," globus "globe," Ger. Kugel, E. clot; PIE *gel- "to make into a ball").

sounding balloon
  بالون ِ گمانه‌زنی   
bâlon-e gamâne-zani

Fr.: ballon-sonde   

A small, free balloon sent into the upper atmosphere to measure, record, and transmit meteorological reports to a ground station.

sounding; → balloon.