šaxânik, šahâbsangšenâsi, šahâbsangik
The science or study of meteorites.
A solid object in → interplanetary space before it reaches the Earth's atmosphere. Meteoroids are of → silicate and/or → metallic matter having a size from tiniest grains up to that of the smallest → asteroids.
Fr.: courants de météoroïdes
The meteoroids distributed all along an → orbit and diffused somewhat around it.
Fr.: essaim de météoroïdes
A relatively dense collection of meteoroids at certain spots along some → meteoroid streams.
Fr.: observation météorologique
Evaluation or measurement of one or more meteorological elements.
Fr.: observatoire météorologique
A scientific establishment dedicated to making precise and detailed meteorological observations and to studying and forecasting atmospheric phenomena by means of special equipments.
The study of the physics, chemistry, and dynamics of the Earth's atmosphere, including the related effects at the air-earth boundary over both land and the oceans.
From Gk. meteorologia "discussion of celestial phenomena," from meteoron→ meteor + -logia, &rarr-logy.
Havâšenâsi, from havâ "weather, air," → air.
A small grain sized meteorite which can only be positively identified under the microscope.
šahâb-e bârâni, ~ ragbâri
Fr.: météore de la pluie, ~ ~ l'averse
Fr.: météore sporadique
A meteor occurring occasionally, and not associated with any known meteor shower.
Sporadic, from M.L. sporadicus "scattered," from Gk. sporadikos "scattered," from sporas (genitive sporados) "scattered," from spora "seed, a sowing;" related to sporos "sowing," and speirein "to sow," from PIE *sper- "to strew;" → meteor.
Šahâb, → meteor; gahgâhi "from time to time," from gah, gâh "time; place" (Mid.Pers. gâh, gâs "time;" O.Pers. gāθu-; Av. gātav-, gātu- "place, throne, spot;" cf. Skt. gâtu- "going, motion; free space for moving; place of abode;" PIE *gwem- "to go, come").
Fr.: météorite pierreuse
A meteorite composed largely of rock-forming (→ silicate) → minerals. Stony meteorites are the most abundant kind, about 95%, of all meteorites. They are divided into two groups: → chondrites and → achondrites.
Fr.: sidérolithe, sidérolite
Meteorites comprised of roughly equal amounts of → nickel/→ iron and → stone. They are divided into two groups: → pallasites and → mesosiderites. The stony-irons are thought to have formed at the core/mantle boundary of their parent bodies. The stony-irons account for less than 2% of all known meteorites. Also called → siderolite.
Fr.: météorite indifférenciée
A type of meteorite in which the constituting materials (stone, glass, metal) are mixed together in a disorderly mass, in contrast to → differentiated meteorites.
→ un-; → differentiated meteorite.