interorbit
Interorbit refers to the region of space between two celestial orbits. This concept is particularly relevant in orbital mechanics and astrodynamics, describing the space through which a spacecraft or celestial body travels when changing its orbital path or when considering the volume of space occupied by multiple objects in different orbits around a common gravitational primary. For instance, the region between Earth's orbit and Mars' orbit is an interorbit.
In the context of spaceflight, missions often involve traversing interorbit regions to move from one orbit