Also, the plane in which this great circle lies.
A great circle drawn on a terrestrial globe, used for illustrating and solving astronomical problems.
The great circle on the celestial sphere that is the mean apparent path of the sun as viewed from the earth.
Relating to an eclipse or the ecliptic.
A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .
The region in which something or someone is active; one's province, domain.
The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point .
A spherical physical object; a globe or ball.
Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).
The extension of a general conception, or the totality of the individuals or species to which it may be applied.
An area of activity for a planet; or by extension, an area of influence for a god, hero etc.
To place in a sphere, or among the spheres; to ensphere.
To make round or spherical; to perfect.