Sphere two poles is called the axis of rotation. Circles on the sphere that are parallel to the equator are lines of latitude. This terminology is also used for such approximately spheroidal astronomical bodies as the planet Earth (see geoid). Any plane that includes the center of a sphere divides it into two equal hemispheres. Any two intersecting planes that include the center of a sphere subdivide the sphere into four lunes or biangles, the vertices of which all coincide with the antipodal points lying on the line of intersection of the planes. The antipodal quotient of the sphere is the
Sphere (novel) team returns to the habitat, Adams succeeds in opening and entering the sphere. Meanwhile, on the surface, a Pacific cyclone forces the supporting Naval ships to evacuate, trapping and isolating the scientists on the ocean floor for five days. Adams is found and returned to the DH-8 Habitat where he awakens with a terrible headache and little-to-no memory of how he opened the sphere or what occurred while he was inside. Immediately afterwards, the team is contacted by an intelligent, seemingly friendly alien entity that calls itself "Jerry". At first, Jerry communicates with the scientists using a numeric code transmitted