|The plane of the Earth's orbit around the Sun. The ecliptic plane is used as the primary reference plane when describing the position of bodies in the solar system. |
Most objects in the solar system orbit in roughly this plane and in the same direction around the Sun as the Earth. There are exceptions such as many comets and a few minor planets which have high inclinations. Some comets even have retrograde orbits (e.g. Halley's comet) and orbit in the opposite direction to the planets.