One possibility is that they are too close to the sun, so that the sun's gravity would disrupt the orbit of any would-be moon. Or perhaps Mercury and Venus never experienced any events that would lead to the formation of moons with stable orbits.
Mercury and Venus.
Neither Mercury nor Venus are known to have any moons.
The planets in our solar system that do not have any moons are Mercury and Venus.
No, Mercury and Venus do not have moons.
Mercury and Venus have no moons.
Mercury and Venus are the two planets that have no moons.
Mercury and Venus.Mercury and Venus.Mercury and Venus.Mercury and Venus.
Venus and Mercury have no moons.
No. Mercury and Venus have no moons.
Mercury and Venus have no moons.
Mercury and Venus do not have moons.
No. Mercury and Venus do not have moons.