None.
Mercury has no natural satellites.
Mercury and Venus do not have any natural satellites (Moons).
The planet Mercury has no natural satellites.
None.
there is 7 natural ones
No natural satellites of Mercury have been discovered.
There are no natural satellites.
Mercury has no natural nor artificial satellites.
No natural satellites of Mercury have been discovered.
No natural satellites of the planets Mercury or Venus have ever been discovered.
Mercury and Venus have no known natural satellites (moons).
Mercury and Venus have no natural satellites.