Angle between the plane of an object’s The elliptical path of one body around another, typically the path of a small body around a much larger body. However, depending on the mass distribution of the objects, they may rotate around an empty spot in space • The Moon orbits around the Earth. • The Earth orbits around Click on Term to Read More and the Plane of Earth's orbit around the sun. All the planets except Mercury and Pluto have orbits in nearly the same plane. The Sun's axis is tilted at an angle of 7 °15' to the ecliptic, which has been proposed as evidence the Sun was originally part of a binary star Click on Term to Read More; the inclination of a moon’s orbit is the angle between the plane of its orbit and the plane of its primary’s equator.