Circle of a sphere the Equator the only great circle. By contrast, all meridians of longitude, paired with their opposite meridian in the other hemisphere, form great circles. The diameter of the sphere which passes through the center of the circle is called its axis and the endpoints of this diameter are called its poles. A circle of a sphere can also be defined as the set of points at a given angular distance from a given pole. When the intersection of a sphere and a plane is not empty or a single point, it is a circle. This can be seen as follows:
Sphere (novel) film by Andrei Tarkovsky". Reviews were mostly positive for the novel. "The New York Times" Robin McKinley said, "Part of the fun of "Sphere" is that it keeps you going even when you're pretty sure of what will happen next." Sphere (novel) Sphere is a novel written by author Michael Crichton that was published in 1987. The novel was adapted into the film "Sphere" in 1998. The story follows Norman Johnson, a psychologist engaged by the United States Navy, who joins a team of scientists assembled to examine a spacecraft of unknown origin discovered on the bottom of the Pacific