A body or space contained under a single surface, which in every part is equally distant from a point within called its center.
Hence, any globe or globular body, especially a celestial one, as the sun, a planet, or the earth.
The apparent surface of the heavens, which is assumed to be spherical and everywhere equally distant, in which the heavenly bodies appear to have their places, and on which the various astronomical circles, as of right ascension and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it.
In ancient astronomy, one of the concentric and eccentric revolving spherical transparent shells in which the stars, sun, planets, and moon were supposed to be set, and by which they were carried, in such a manner as to produce their apparent motions.
The extension of a general conception, or the totality of the individuals or species to which it may be applied.
Circuit or range of action, knowledge, or influence; compass; province; employment; place of existence.
Rank; order of society; social positions.
An orbit, as of a star; a socket.
To place in a sphere, or among the spheres; to insphere.
To form into roundness; to make spherical, or spheral; to perfect.
Every living being is an engine geared to the wheelwork of the universe. Though seemingly affected only by its immediate surrounding, the sphere of external influence extends to infinite distance. Nikola Tesla
The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives. Albert Einstein
A good education is that which prepares us for our future sphere of action and makes us contented with that situation in life in which God, in his infinite mercy, has seen fit to place us, to be perfectly resigned to our lot in life, whatever it may be. Ann Plato
People need to be made conscious of a very simple reality: we have no choice but to share this planet, this small blue sphere floating in the vast reaches of space, with all of our fellow 'passengers.' Daisaku Ikeda
Discretion is nothing other than the sense of justice with respect to the sphere of the intimate contents of life. Georg Simmel