Communism is the strictly theoretical system imagined by Karl Marx in which all of society, all of economics and all politics are combined into one, perfect, classless, automatic, government-less system based on common ownership of all economic means of production, and social sameness.
The word elliptical is derived from the oval shape known as an ellipse. Many comets have an elliptical orbit around the Sun that brings them closer at some times and farther away at others. The adjective elliptical refers to the shape of an ellipse, which is an elongated circle, stretched into an oval. While it is a mathematical shape, it also is used to describe a way of speaking that cuts out extra, unnecessary language.
Definition of sphere. 1a (1) : the apparent surface of the heavens of which half forms the dome of the visible sky (2) : any of the concentric and eccentric revolving spherical transparent shells in which according to ancient astronomy stars, sun, planets, and moon are setb : a globe depicting such a sphere; broadly : globe a.