sidereal hour angle zâviye-ye sâ'ati-ye axtari (#) Fr.: angle horaire The angle on the celestial sphere measured westward from the hour circle of the vernal equinox to that of the celestial body. → sidereal; → hour angle. |
solid angle zâviye-ye fazâyi, ~ dafzé Fr.: angle solide The figure formed by three or more planes meeting at a common point or formed at the vertex of a cone. The solid angle completely surrounding a point is 4π steradian. → steradian. Zâviyé, → angle; fazâyi "of or relating to space," → space; jâmed, → solid. |
spherical angle zâviye-ye koreyi Fr.: angle sphérique An angle formed on the surface of a sphere by the intersection of two great circles of the sphere. |
spherical triangle sebar-e kore-yi Fr.: triangle sphérique A triangle drawn on the → surface of a → sphere. A spherical triangle, like a plane triangle, may be right, obtuse, acute, equilateral, isosceles, or scalene. The sum of the angles of a spherical triangle is greater than 180° (π) and less than 540° (3π). See also → spherical excess. |
subtended angle zâvie-ye zirtânidé Fr.: angle sous-tendu An angle whose two sides pass through the endpoints of an arc. |
summer triangle sebar-e tâbestâni Fr.: triangle d'été The triangular shape formed by the three bright stars → Altair, → Deneb, and → Vega on the northern hemisphere's → celestial sphere, particularly visible during the summer months. |
supplementary angle zâviye-ye âporandé Fr.: angle supplémentaire The angle that when added to a given angle makes 180°. → complementary angle. → supplementary; → angle. |
tilt angle zâviye-ye gerâ Fr.: angle d'inclinaison The angle a rocket makes with the vertical as it curves along its trajectory. |
triangle seguš (#), segušé; (#), sebar (#) Fr.: triangle The plane figure formed by three lines intersecting in pairs at three points; a three-sided → polygon. → equilateral triangle, → isosceles triangle, → scalene triangle. M.E., from O.Fr. triangle, from L. triangulum "triangle," from neuter of adj. triangulus "three-cornered," from tri-, → three, + angulus "corner," → angle. Seguš "three-cornered," from sé,
→ three,
+ guš "corner, → angle." |
triangle inequality nâhamugi-ye sebari Fr.: inégalité triangulaire 1) A theorem according to which any side of a triangle is always shorter than the sum of the
other two sides. → triangle; → inequality. |
viewing angle zâviye-ye did (#) Fr.: angle de visée The maximum angle at which a display, such as a TV screen, can be viewed with acceptable visual performance. Viewing, from view, M.E. v(i)ewe (n.); M.Fr. veue "sight," feminine p.p. of veoir "to see," from L. videre "to see," → vision; → angle. |
Wide Angle Search for Planets (WASP) WASP: josteju-ye sayâré bâ zâviye-ye gošâdé Fr.: WASP: recherche à angle large de planètes An international collaboration, more accurately named SuperWASP, led by the United Kingdom, that aims at detecting → extrasolar planets by means of the → transit method. SuperWASP consists of two robotic observatories that operate continuously all year around, providing coverage of the sky in both hemispheres. The first, SuperWASP-North, is located on the island of La Palma. The second, SuperWASP-South, is located at the site of the South African Astronomical Observatory (SAAO). The observatories each consist of eight wide-angle cameras that simultaneously monitor the sky for → planetary transit events. Using the array of cameras makes it possible to monitor millions of stars simultaneously at an → apparent visual magnitude from about 7 to 13. |