Only the Earth has one moon.
neither venes or Mercury has a moon.
Earth and Pluto
No two planets share the same moon.
Of the inner planets, Earth has one moon and Mars has two.
Earth (with one moon) and Mars (with two moons). Mercury and Venus do not have any moons.
The question seems reversed. All but two of the planets have at least one moon. The only planets that don't have any moons are Mercury and Venus.
Within the Solar System, Earth is the only planet with one moon - The Moon.
Mercury and Venus are the two planets that have no moon. Earth has one moon and Mars has two smaller moons. Jupiter, Saturn, Uranus, and Neptune have numerous moons.
Actually all the current planets are larger than our moon.
No moons . . . Mercury and Venus One moon . . . Earth Two moons . . . Mars Each of the other planets has more than two moons. Jupiter leads with more than 60 !
Apiece (one word) is an adverb meaning each, per each, or for each. Example sentence:You will get two cookies apiece when you finish your lunch.
Earth is the only planet with one moon. Pluto use to be classified as a planet. It had only one discovered moon for a while, but astronomers have since found more moons belonging to Pluto.