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.
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.
Fr.: angle sphérique
An angle formed on the surface of a sphere by the intersection of two great circles of the sphere.
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.
Fr.: angle sous-tendu
An angle whose two sides pass through the endpoints of an arc.
Fr.: triangle d'été
Fr.: angle supplémentaire
The angle that when added to a given angle makes 180°. → complementary angle.
Fr.: angle d'inclinaison
The angle a rocket makes with the vertical as it curves along its trajectory.
seguš (#), segušé; (#), sebar (#)
Fr.: inégalité triangulaire
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.
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.