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 pedagogy opinion through critical rational discourse. Habermas argued that these discussions served to fill the gap between the state and the people by creating what he called a "civil society". Further, Habermas argued that a functioning public sphere was critical to maintaining a healthy democratic order and deliberative democracy. This traditional notion of a face-to-face public sphere has evolved with the invention of online technologies. The public sphere no longer requires a physical setting, but can manifest in cyberspace. The coffee house discussions idealized by Habermas have expanded to blogs, discussion forums, and online videos. Henry Giroux in particular discusses the