TERMIUM Plus^®

Record 1,  Textual support,  English

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Un objet astronomique est le plus souvent un objet émettant ou réfléchissant de la lumière [...] jusqu'à la Terre. Il existe de multiples méthodes pour étudier les caractéristiques de cette lumière. Par exemple, dans les cas de la spectroscopie ou de la photométrie, un objet astronomique peut être étudié sous forme de spectres ou de courbes de luminosité relative […]  2, record 1, French, - courbe%20de%20luminosit%C3%A9%20relative

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

[A] plot of spectral luminous efficiency versus wavelength.  3, record 2, English, - absolute%20light%20curve

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Visual photometer in which the parts of the comparison field are viewed simultaneously and are adjusted to equality of luminosity [or of contrast].  1, record 3, English, - equality%20of%20luminosity%20photometer

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Photomètre visuel dans lequel on ajuste à égalité de luminosité [ou de contraste] deux plages juxtaposées présentées à l'œil simultanément.  1, record 3, French, - photom%C3%A8tre%20%C3%A0%20%C3%A9galisation%20de%20luminosit%C3%A9

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A graph of sensitivity as a function of spectral wavelength or, less frequently, of spectral wave number or frequency.  2, record 4, English, - spectral%20sensitivity%20curve

Record number: 4, Textual support number: 1 OBS

Often synonymous with luminosity curve, but usually restricted to threshold measurements rather than suprathreshold matches.  2, record 4, English, - spectral%20sensitivity%20curve

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

Concordance entre la sensibilité spectrale de la rhodopsine et la courbe d'efficacité lumineuse scotopique.  2, record 4, French, - courbe%20de%20sensibilit%C3%A9%20spectrale

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

One of the three properties of a color (the other two being saturation and hue).  6, record 5, English, - lightness

Record number: 5, Textual support number: 1 CONT

Darkness can be thought of as the black content of a color. It is this characteristic which is referred to by the use of such descriptive modifiers as "prussian" blue and "forest" green.  7, record 5, English, - lightness

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

L'une des trois caractéristiques d'une couleur (les deux autres étant la teinte et la pureté). Cette caractéristique exprime la quantité de lumière reçue qui est d'autant plus faible que la couleur contient du noir.  5, record 5, French, - clart%C3%A9

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

Cantidad de luz u oscuridad presente en determinado color.  1, record 5, Spanish, - claridad

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

The relative brightness of a light expressed in absolute terms such as lumens per watt.  2, record 7, English, - absolute%20luminosity

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  French

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

The total radiative output of a star.  1, record 9, English, - luminosity

Record number: 9, Textual support number: 1 CONT

The luminosity of stars is in theory dependent on mass if their chemical composition is similar. It has been found that with the notable exception of highly evolved stars the mass-luminosity relation is obeyed approximately.  2, record 9, English, - luminosity

Record number: 9, Textual support number: 1 OBS

"brightness" is often used to refer to "luminosity" but is a more general term which does not correspond exactly to the notion of luminosity.  1, record 9, English, - luminosity

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

Puissance totale rayonnée par un astre, intégré sur tout le spectre électromagnétique et dans toutes les directions.  1, record 9, French, - luminosit%C3%A9

Record number: 9, Textual support number: 1 CONT

Une relation très intéressante entre la masse des étoiles et leurs luminosité absolue a été mise en évidence par O. Struve. Si l'on porte en abscisse le logarithme de la masse et en ordonnée la magnitude absolue, les points représentatifs des étoiles se placent en majorité sur une droite : la luminosité d'une étoile est proportionnelle à sa masse.  1, record 9, French, - luminosit%C3%A9

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

The psychological dimension of light that corresponds to the amplitude of the light wave.  3, record 10, English, - brightness

Record number: 10, Textual support number: 1 OBS

"Brightness" is the preferred term in the United States. Do not confuse with "luminance" (FR:luminance).  4, record 10, English, - brightness

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 DEF

Dimension perceptive correspondant à la luminance.  1, record 10, French, - luminosit%C3%A9

Record number: 10, Textual support number: 1 OBS

[Le terme «brillance» a été] remplacé aujourd'hui dans son acception subjective par «luminosité».  1, record 10, French, - luminosit%C3%A9

Record number: 10, Textual support number: 2 OBS

H. Piéron avait proposé le terme de «phanie», qui n'a pas été retenu par la Commission internationale de l'éclairage, ou C.I.E.  1, record 10, French, - luminosit%C3%A9

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

the total amount of energy radiated from a star's entire surface area per second. The luminosity is always measured in absolute magnitude.  1, record 11, English, - star%20luminosity

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

La quantité totale d'énergie dont l'étoile dispose; énergie qu'elle émet chaque seconde dans tout l'espace. L'énergie totale est toujours mesurée en magnitude absolue.  1, record 11, French, - luminosit%C3%A9%20des%20%C3%A9toiles

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 OBS

A curve depicting the visual threshold at different wavelengths. The luminosity curve for daylight vision has its greatest sensitivity at about 555 millimicrons; the comparable curve for night vision has its greatest sensitivity at about 505 millimicrons.  1, record 12, English, - luminosity%20curve

Record number: 12, Textual support number: 2 OBS

Note: Term defined in a specialized glossary of psychometrics.  2, record 12, English, - luminosity%20curve

Record 12,  Textual support,  French

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 OBS

In favorable cases it has been found possible to divide stars of a given spectral class into as many as six categories, called "luminosity classes", that depend on their luminosities (or sizes). These luminosity classes are: Ia Brightest supergiants Ib Less luminous supergiants II Bright giants III Giants IV Sub-giants (intermediate between giants and main-sequence stars) V Main-sequence stars.  1, record 13, English, - luminosity%20class

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 OBS

Ces dernières séries s'appellent "classes de luminosité" et on les désigne par les chiffres romains de I à VII qui se notent après le symbole de la classe spectrale. (...) Classe I: supergéantes (...). Classe II: géantes brillantes. Classe III: géantes. Classe IV: sous-géantes. Les trois dernières classes se situent dans le diagramme entre les supergéantes et la série principale. Classe V: série principale. Classe VI: sous-naines brillantes. (...) Classe VII: naines blanches.  1, record 13, French, - classe%20de%20luminosit%C3%A9

Record 13,  Textual support,  Spanish