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
Private sphere of experiential knowledge and the world of the body – as against the (traditional) male preserves of public speech and theory. All the while, the public sphere of work, business, politics and ideas were increasingly opened up to female participation. Martin Heidegger argued that it is only in the private sphere that one can be one's authentic self, as opposed to the impersonal and identikit They of the public realm. Richard Sennett however opposed what he saw as the Romantic idealisation of the private realm of intimate relations, as opposed to the public sphere of action at a distance. Deleuze