Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. scientific concepts
5. physical sciences concepts
6. astronomical concepts

Anotations

Scope note:

The regularly repeated, typically elliptical courses of a celestial object, satellite, spacecraft, or other object, around a more massive body to which it is bound by gravity. Examples are the orbits of planets around the sun.