Along with Earth-based observatories, space probes such as Galileo and Clementine have discovered a plethora of new moons, craters and other features, all of which need names for the benefit of present-day astronomers and any future explorers.
(space probes such as Galileo and Clementine; have discovered; a plethora of new moons, craters and other features) (all of which; need; names for the benefit of present-day astronomers and any future explorers)
space probes such as Galileo and Clementine all of which
have discovered need
a plethora of new moons, craters and other features
names for the benefit of present-day astronomers and any future explorers