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
Public sphere that are "parallel discursive arenas where members of subordinated social groups invent and circulate counterdiscourses to formulate oppositional interpretations of their identities, interests, and needs". Benhabib notes that in Habermas' idea of the public sphere, the distinction between public and private issues separates issues that normally affect women (issues of "reproduction, nurture and care for the young, the sick, and the elderly") into the private realm and out of the discussion in the public sphere. She argues that if the public sphere is to be open to any discussion that affects the population, there cannot be distinctions between "what is"