1-periodic orbit

2-periodic orbit

5 degree polyhomical chains orbit

Ab Inition of Molecular Orbit

absolute orbit

Accuracy of orbit determination

accuracy of orbit parameters

action orbit

Acute inflammation of orbit

Adipose body of orbit

Adjoint orbit

Advanced Orbit System

advanced orbit systems

Almost-orbit

analytical orbit determination

angle of inclination of an orbit

anterior orbit

anti-orbit intercepting

apparent orbit

Ascending and descending orbit