MOST Space Telescope
teleskop-e fazâyi-ye MOST
Fr.: télescope spatial MOST
A small telescope dedicated entirely to → asterolseismology. MOST is the first space telescope entirely designed and constructed by Canada. It was launched into space in 2003. The satellite weighs only 54 kg and is equipped with an ultra high precision telescope that measures only 15 centimetres in diameter. Despite its tiny size, it is ten times more sensitive than the → Hubble Space Telescope in detecting the minuscule variations in a star's luminosity caused by vibrations that shake its surface. MOST completes one orbit around the Earth every 101 minutes by passing over each of Earth's poles.
MOST, short for Microvariability and Oscillations of STars telescope.
A female → parent.
M.E. mother, moder, O.E. modor; cf. O.S. modar, O.N. moðir, Da. moder, Du. moeder, O.H.G. muoter, Ger. Mutter; PIE *mater- "mother;" akin to Pers. mâdar, as below.
Mâdar, from Mid.Pers. mâd, mâdar; O.Pers./Av. mātar- "mother;" cf. Ossetic mad/madae "mother;" Khotanese mâta "mother;" Skt. mātár- "mother;" Gk. meter, mater; L. mater (Fr. mère, Sp. madre).
The action or process of moving or of changing place or position; movement.
Verbal noun of → move.
A device that imparts motion through reaction.
From L. motor "mover," from movere "to move."
Motor, loanword from Fr. moteur, as above.
A general term for a relatively bright or dark feature seen in monochromatic images taken in the red Hα → Balmer line of the solar → chromosphere. Mottles constitute the fine structure of the quiet solar chromosphere and are found near bright points at → supergranulation boundaries.
Probably back formation from motley, from M.E., O.E. mot "speck," of unknown origin; maybe related to Du. mot "sawdust, grit;" Norw. mutt "speck."
Capârak noun from capâr "spotted, speckled, mottled" + -ak diminutive/similarity suffix.
Mount Wilson Observatory
nepâhešgâh-e Mount Wilson
Fr.: Observatoire du Mont Wilson
An observatory situated on a mountain 1700 m above sea level near Pasadena, California. It was built in 1904 by American astronomer George Ellery Hale as a solar-observing station for the Yerkes Observatory, but it became an independent observatory funded by the Carnegie Institution of Washington. In 1908 a 60-inch (152-cm) reflector, then the largest in the world, was added for observations of stars and galaxies. Ten years later a 100-inch (254-cm) reflecting telescope was put into service. It was the most powerful telescope in the world until the construction of the Palomar 200-inch reflector in 1948. The 100-inch telescope's most important discovery was Edwin Hubble's determination of the distance to the Andromeda Nebula in 1924. He showed that the nebula lay beyond the bounds of the Milky Way Galaxy and hence was a galaxy in its own right. Then in 1929, following the work of Vesto Slipher, Hubble and his assistant Milton Humason demonstrated that galaxies were moving away from one another. This movement is the expansion of the Universe.
A natural elevation of the Earth's surface rising to a summit, and attaining an altitude greater than that of a hill.
From O.Fr. montaigne, from V.L. *montanea "mountain, mountain region," from L. montanus "mountainous," from mons (gen. montis) "mountain," minere "to project, jut, threaten," from PIE base *men- "to project;" cf. Av. matay-, mati- "protrusion of mountain range," framanyente "to be protruding, jutting;" from PIE base *men- "to stand out, to project;" (other related terms: mouth, prominent, amount, etc.).
Kuh "mountain," from Mid.Pers. kôf "mountain, hill; hump;" O.Pers. kaufa- "mountain;" Av. kaofa- "mountain."
kelimâ-ye kuhestân (#)
Fr.: climat de montagne
Climate of relatively high elevations, specifically where optical observatories are situated.
The support structure for a telescope that bears the weight of the telescope and allows it to be pointed at a target.
From verb mount, from O.Fr. monter "to go up, climb, mount," from V.L. *montare, from L. mons (genitive montis) → mountain
Barnešând, noun of Barnešândan "to set, to fix, make sit," from bar- "on, upon, up" (Mid.Pers. abar; O.Pers. upariy "above; over, upon, according to;" Av. upairi "above, over," upairi.zəma- "located above the earth;" cf. Gk. hyper- "over, above;" L. super-; O.H.G. ubir "over;" PIE base *uper "over") + nešândan "to place one thing upon another, to fix, insert," from nešastan "to sit;" Mid.Pers. nišastan "to sit;" O.Pers. nišādayam [1 sg.impf.caus.act.] "to sit down, to establish," hadiš- "abode;" Av. nišasiiā [1 sg.subj.acr.] "I shall sit down," from nihad- "to sit down," from ni- "down, below, into," → ni-, + had- "to sit;" PIE base *sed- "to sit;" cf. Skt. sad- "to sit," sidati "sits;" Gk. hezomai "to sit," hedra "seat, chair;" L. sedere "to sit;" O.Ir. suide "seat, sitting;" Welsh sedd "seat;" Lith. sedmi "to sit;" Rus. sad "garden;" Goth. sitan, Ger. sitzen; E. sit.
1) Any of numerous small Old World rodents of the family Muridae, especially of
the genus Mus, introduced widely in other parts of the world.
M.E. mous (plural mis), from O.E. mus "small rodent;" cf. O.N., O.Fr., M.Du., Dan., Sw. mus, Du. muis, Ger. Maus, Pers. muš, as below.
Muš "mouse," dialectal Lori, Laki miš; Mid.Pers. mušk; cf. Skt. muš-, muš-; Gk. mys; L. mus; O.E. mys; Ger. Maus.
1) The body opening through which an animal takes in food.
M.E., from O.E. muth "mouth, opening, door, gate;" cf. O.Sax., O.Norse munnr, Dan. mund, Du. mond, Ger. Mund.
Dahân "mouth," variant zafar "mouth;" Mid.Pers. dahân "mouth;" from *dafân the south-west form of Av. zafan, zafar "mouth;" cf. Skt. jambha- "set of teeth, mouth, jaws;" Ger. Kiefer "jaw."
Capable of being moved; not fixed in one place, position, or posture (Dictionary.com).
1) jonbidan (#), miyâvidan; 2) jonbândan (#), miyâvândan
Fr.: 1) se mouvoir, bouger; 2) mouvoir, bouger
1) To go from one place or position to another.
M.E. meven, moven; O.Fr. moveir; L. movere "move, set in motion;" Av. miuu- "to shove," as below.
Jonbidan "to move;" Lori, Laki jem "motion," Kurd. -žim-
"to move, stir," žimây-/žimn- "to rock a cradle,"
Sogd. âyamb "to pervert, seduce, deceive," yâb
"to wander, travel, rove;" Mid.Pers. jumbidan, jumb- "to move;" cf.
Tocharian yâw-, yâp- "to enter;" Luwian /iba-/ "west;" PIE
base *ieb(h)- "to go, move inside" (Cheung 2007).
The act, process, or result of moving. A particular manner or style of moving.
jonbandé, jonbân, dar jonbeš, miyâvandé
Fr.: en mouvement
Verbal adj. of move, → motion.
xuše-ye jonbandé (#)
Fr.: amas en mouvement
A group of stars dynamically associated so that they have a common motion with respect to the local standard of rest.
Fr.: référentiel en mouvement
Fr.: groupe mobile
A young → stellar population that shares a common space motion. A moving group remains kinematically distinct within the general field stars at ages < 1 billion years, before being dispersed. As progenitor gas is cleared by OB star winds, and the natal cluster expands, stars with sufficiently high velocities become unbound and form a young, coeval moving group, possibly leaving behind a bound open cluster. Because of their common origin, moving group members have a shared age and composition. The nearest moving group is the → TW Hydrae association.
MRN dust model
Fr.: modèle MRN
A model concerned with the distribution in size of → interstellar grains to account for observations of → interstellar extinction from 0.11 μm to 1.0 μm. The → distribution has the form N(a)da ∝ a-3.5da, where a is the grain radius. It extends from 5 nm to 1 μm for → graphite and over a narrower range for other materials.
Fr.: μ Cephei
A → red supergiant star in the → constellation → Cepheus. It is one of the largest and most luminous stars known in the → Milky Way. μ Cephei appears garnet red and is given the → spectral type of M2 Ia. The star may even be the largest star visible to the → naked eye with an estimated radius of 1.15 billion kilometres. If it replaced the Sun, it would extend beyond the orbit of Saturn. Some of its → physical parameters are: mass = 15 Msol; → radius = 1650 Rsol; → luminosity = 60 x 104 Lsol; → effective temperature = 3690 K. Also called Herschel's → Garnet star.
Cephei, genitive of → Cepheus.