There is no major planet in the Solar System with four moons.
Jupiter has at least 67, Saturn has at least 62, Uranus has 27 known moons, and Neptune has 14.
Among the inner planets, Mars has two small moons and the Earth has one large Moon.
The dwarf planet Pluto has 5 moons. One (Charon) is half as large as Pluto and the other four are very small. If Pluto and Charon were considered co-planets, they would be said to have 4 moons.
Jupiter
You probably mean to ask about natural satellites as opposed to artificial satellites. In terms of neutrality, all satellites are neutral. In any event, the planet Jupiter has the most natural satellites, of any planet in our solar system. The planet Earth has the most artificial satellites.
Eclipse
There are no known satellites of Mercury.
The blue-green planet with 27 satellites is Uranus. It is the seventh planet from the sun in our solar system and has 27 known moons or satellites.
Mercury & Venus have no natural satellites.
Ganymede is a moon of Jupiter. It is the largest of the four Galilean satellites first observed and noted by Galileo. The other three are Io, Europa, and Callisto.Ganymede is not a planet.
Moons are the heavenly bodies that revolve around a planet. Moons are natural satellites that orbit a planet in a regular and predictable manner, influenced by the planet's gravity. The Earth's moon is an example of a natural satellite that orbits our planet.
Jupiter has the most satellites in our solar system, with a total of 79 known moons. These moons vary in size, with the four largest being Io, Europa, Ganymede, and Callisto.
Objects such as moons or satellites that revolve around a planet are typically referred to as "natural satellites" or "moons." Artificial satellites placed in orbit around a planet are simply called "satellites."
The planet Jupiter, which is the largest planet in the solar system, also has the most moons (which is logical, because the large size of Jupiter means that it also has the strongest gravitational field, and can therefore attract satellites more strongly). All of the four gas giants (Jupiter, Saturn, Uranus, and Neptune) have lots of satellites. The inner planets have fewer satellites.
The planet Mercury has no natural satellites.