Fr.: latitude astronomique
The angle between the → equatorial plane and the true → vertical at a point on the surface.
→ astronomical; → latitude.
Fr.: latitude céleste
Angular distance → north or → south measured from the → ecliptic to a → celestial object.
circle of latitude
1) A circle of the celestial sphere, parallel to the ecliptic.
The polar angle on a sphere measured from the north pole instead of the equator; equal to "90° - latitude".
Fr.: latitude écliptique
One of the two coordinates in the → ecliptic system; the angle measured from the ecliptic, positive toward the north.
Fr.: latitude galactique
In the → Galactic coordinate system, the angle between the line of sight to an object and the → Galactic equator. Galactic latitude, usually represented by the symbol bII, ranges from +90 degrees to -90 degrees.
Fr.: latitude géocentrique
The angle between the geocentric location vector and the → geodetic equator.
→ geocentric; → latitude.
Fr.: latitude géodésique
The → acute angle between the → geodetic vertical and the → geodetic equator.
Fr.: latitude géographique
A synonym for → geodetic latitude or → astronomical latitude.
→ geographic; → latitude.
Fr.: hautes latitudes
The latitude belt roughly between 60 and 90 degrees North and South. Also referred to as the polar region.
Fr.: calmes tropicaux, latitudes des chevaux
The belts of latitude over the oceans, located around 30° north and south of the equator, characterized by predominantly calm or light winds and hot and dry weather.
→ horse; → latitude.
The angle between a perpendicular at a location, and the
→ equatorial plane of the Earth.
→ longitude. See also:
L. latitudo "breadth, width, size," from latus "wide," from PIE base *stela- "to spread" (cf. O.C.S. steljo "to spread out," Arm. lain "broad").
Varunâ, from var "breadth, side, breast," variant bar, Tabari vari "width," Mid.Pers. var "breast," Av. varah- "breast" (Sk. vara- "width, breadth") + -u a suffix forming adjectives; Av. vouru- "wide;" + -nâ a suffix of dimension.
libration in latitude
Fr.: libration en latitude
A tiny oscillating motion of the Moon arising from the fact that the Moon's axis is slightly inclined relative to the Earth's. More specifically, the Moon's polar axis is tilted nearly 7° with respect to the plane of its orbit around Earth. Hence for half of each orbit we see slightly more of the north pole when its tipped toward us, and for the other half we see slightly more of its south pole. Libration in latitude displaces the mean center of the Moon north-south by between 6°.5 and 6°.9.
Fr.: latitudes moyennes
The latitude belt roughly between 35 and 65 degrees North and South. Also referred to as the temperate region.
varunâ-ye kore-yi, ~ sepehri
Fr.: latitude sphérique
The angle between the → normal to a spherical reference surface and the → equatorial plane.
Fr.: latitude supergalactique
→ supergalactic coordinate system.
→ supergalactic; → latitude.