Concept
Retrograde Orbit
An orbit opposite to the parent's spin.
An orbit going opposite the direction of the central body's rotation — common among captured moons like Triton.
Overview
An orbit going opposite the direction of the central body's rotation — common among captured moons like Triton.
See also
Prograde Orbit
An orbit in the same sense as the parent's spin.
Exoplanets
Worlds orbiting other stars.
Perihelion
The closest point in an orbit to the Sun.
Aphelion
The farthest point in an orbit from the Sun.
Perigee
The closest point in an Earth-centred orbit.
Apogee
The farthest point in an Earth-centred orbit.