There are at least 5 known or theorized volcanic moons in our solar system. The Moon, Jupiter's moon Io, Saturn's moons Enceladus and Titan, and Neptune's moon Triton are all volcanic.
There are a total of 214 moons orbiting planets in our solar system.
Mercury and Venus do not have moons.
169 moons.
There are 180 moons in our solar system.
There are six.
Mercury is a planet in our solar system that does not have any moons.
Mercury and venus
Two of them
At least 178
13
Jupiter has 63 confirmed moons. See link for further information about them.
The answer is there are two planets which have no moons. Venus and Mercury