The orbital plane of an object orbiting another is the geometrical plane in which the orbit is embedded. Three points are required to find the orbital plane: the center of the heavier object, the center of the orbiting object and the center of the orbiting object at some later time. Plane may refer to: Look up Plane in Wiktionary, the free dictionary An Aeroplane or airplane, a type of fixed-wing aircraft. ... In mathematics, an embedding (or imbedding) is one instance of some mathematical object contained within another instance, such as a group that is a subgroup. ...

By definition the inclination of a planet in the solar system is the angle between its orbital plane and that of the Earth. In other cases, for instance a moon orbiting another planet, it is convenient to define the inclination of the moon's orbit as the angle between its orbital plane and the planet's equator. Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... Jump to: navigation, search Presentation of the solar system (not to scale) The solar system is the retinue of objects gravitationally bound to our Sun. ... This article is about angles in geometry. ... Jump to: navigation, search Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ...