Concept
Apogee
The farthest point in an Earth-centred orbit.
The point in a Moon's or satellite's orbit farthest from Earth.
Overview
The point in a Moon's or satellite's orbit farthest from Earth.
See also
Perigee
The closest point in an Earth-centred orbit.
Aphelion
The farthest point in an orbit from the Sun.
Perihelion
The closest point in an orbit to the Sun.
Obliquity
The tilt of a planet's axis to its orbit.
Event Horizon
The point of no return around a black hole.
Singularity
A point of infinite density inside a black hole.