sit-e axtaršenâsik, ~ axtaršenâxti
Fr.: site astronomique
A certain place whose characteristics, as to location, altitude, atmospheric conditions, etc., make it appropriate for astronomical observations.
From O.Fr. composite, from L. compositus, p.p. of componere "to put together," → compose.
Hamnehâdé, p.p. of hamnehâdan→ compose.
Fr.: nombre composite
A whole number which is the product of whole numbers other than itself and 1. The opposite of prime number. → compound number.
Fr.: population composite
A stellar population consisting of more than one → simple population. Also called complex population.
Fr.: spectre composite
A stellar spectrum displaying lines characterising two stars of different types.
1) ru-be-ru; 2) pâdistin; 3) pâdcem
Fr.: 1) opposé, d'en face; 2) contraire, opposé; 3) antonyme
1) Situated, placed, or lying face to face with something else or each
other, or in corresponding positions with relation to an intervening
line, space, or thing: opposite ends of a room (Dictionary.com).
M.E., from M.Fr., from L. oppositus, p.p. of opponere, → opposition.
Named after the German naturalist Peter Pallas (1741-1811), who first studied such a type of meteorites.
Fr.: effet Rossiter-McLaughlin
A → spectroscopic phenomenon observed when either an → eclipsing binary's → secondary star or an → extrasolar planet is seen to → transit across the face of the → primary body. Because of the rotation of the star, an asymmetric distortion takes place in the → line profiles of the stellar spectrum, which changes during the transit. The measurement of this effect can be used to derive the → alignment of the → orbit of the transiting exoplanet with respect to the → rotation axis of the star.
Named after Richard Alfred Rossiter (1886-1977) and Dean Benjamin McLaughlin (1901-1965), American astronomers.
The position or location of a building, observatory, etc. especially as to its environment. → astronomical site.
M.E., from L situs "position, arrangement, site," from sinere "to let, leave alone, permit," cognate with Av. šiti- "place, abode, residence," as below.
Sit, from Av. šiti- "place, abode, residence," šitāy- "habitation, dwelling," from ši- "to live;" cognate with Skt. ksay- "to live, to stay," kséti "he dwells;" Gk. ktizein "to inhabit, build;" L. situs "position, site; situated."
Fr.: sélection de site
The process of choosing a site for an astronomical observatory based on meteorology, seeing conditions, and access to the site.
→ site; → selection.