Pluto has no known rings and it is doubtful that any will be discovered because of Charon. Charon is Pluto's moon or more properly they might be called the Pluto-Charon binary system. The gravitational center of the two bodies is not in the volume of Pluto but in space between it and Charon (for comparison the Earth -Moon system has a common gravitational center - a barycenter - that is a thousand kilometers under the surface of the Earth.
a moon
There are three rings I don't know about satellites
No, it is not true that Pluto has 7 satellites. Pluto actually has five known satellites which are Charon, Styx, Nix, Kerberos, and Hydra.
No missions have yet gone to Pluto, but one is on its way.
Saturn is known for its rings as well as it have 62 Natural Satellites.
The dwarf planet Pluto has at least 10 known satellites. There is also a small system of rings of debris that has been recently detected.
No, Pluto does not have any rings.
have any robots or satellites ever landed on pluto
Pluto have 2 satelites.
a moon
There are three rings I don't know about satellites
No, it is not true that Pluto has 7 satellites. Pluto actually has five known satellites which are Charon, Styx, Nix, Kerberos, and Hydra.
Pluto has at least three moons; Charon, Nix, and Hydra.
No missions have yet gone to Pluto, but one is on its way.
Saturn is known for its rings as well as it have 62 Natural Satellites.
cp rox
Mercury, Mars and Pluto if you consider Pluto as a planet.