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 public sphere involves what is the basic theoretical structure of the public sphere, how information is deliberated in the public sphere, and what influence the public sphere has over society. What does it mean that something is "public"? Jürgen Habermas says, "We call events and occasions 'public' when they are open to all, in contrast to closed or exclusive affairs". This notion of the public becomes evident in terms such as public health, public education, public opinion or public ownership. They are opposed to the notions of private health, private education, private opinion, and private ownership. The notion of the