Word: apogee
Phonetic:
/ˈæ.pə.dʒi/
Listen:
The point, in an orbit about the Earth, that is furthest from the Earth: the apoapsis of an Earth orbiter.
(more generally) The point, in an orbit about any planet, that is farthest from the planet: the apoapsis of any satellite.
(possibly obsolete outside astrology) The point, in any trajectory of an object in space, where it is furthest from the Earth.
The highest point.
You can find a list of possible crossword clues for APOGEE below.