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abstraction > mathematical concept > geometrical object > conic section

conic section
subject			fact

conic section	has dimensions 2
	is a kind of geometrical object

Kinds of conic section :

• ellipse (7 kinds, 24 facts) - A plane curve in which the sum of the distances of each point along its periphery from two points - its "foci" - are equal.
• hyperbola (1 kind, 3 facts)
• Keplerian orbit (6 facts) (osculating orbit) - The path that an orbital body (e.g., a planet) would follow if it were subject only to the inverse-square attraction of the Sun or other central body. In practiced secondary bodies, such as Jupiter, produce perturbations., The orbit of a spherical particle of a finite mass around another spherical particle, also of finite mass, by virtue of the gravitational attraction between them. In the Bohr-Sommerfeld picture of atoms, the electrons are considered as describing Keplerian orbits in the field of the positive nucleus by virtue of the inverse square electric attraction between the electrons and the nuclei.
• parabola