Circle of a sphere the Equator the only great circle. By contrast, all meridians of longitude, paired with their opposite meridian in the other hemisphere, form great circles. The diameter of the sphere which passes through the center of the circle is called its axis and the endpoints of this diameter are called its poles. A circle of a sphere can also be defined as the set of points at a given angular distance from a given pole. When the intersection of a sphere and a plane is not empty or a single point, it is a circle. This can be seen as follows:
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