Well no outer planet has only one moon they all either have more than 1 or none at all.
Earth
No known planet does. Earth is the only planet in the solar system to have only one moon, but it is one of the largest moons in the solar system. Mars has two tiny moons named Phobos and Deimos. The giant planets of the outer solar system all have an assortment of moons big and small.
A planet doesn't "have planets". Anything orbiting a planet is called a moon, or a satellite.
The moon Miranda is believed to have existing ice on it but theoretically it is Co2 which has given the planet an icy look but yes, the planet Miranda does have tiny slates of ice on the surface of the planet
There aren't really ANY satellites that are "proportional" to the planet. Satellites range in size from very tiny to almost-planet-sized. The only really surprising moon is Earth's Moon, which is far larger, compared to the planet, than any other that we know of. However, if we include dwarf planets, then Charon a moon of Pluto is actually the largest compared to it's "parent" planet.
Pluto. It is now considered a "Dwarf Planet", due to its tiny size and the fact that there are other bodies like Pluto in the outer Solar System.
The Earth has only one moon. Early in the planet's history, it is likely that it had many moons. IN fact, back in the 1890's, an astronomer claimed to have discovered a new, tiny moon of the Earth. But he was wrong.
There are probably meteors, small asteroids, or tiny comets that might weigh 1225 newtonson the surface of a moon or planet, but no "planet" would. There are people who weigh morethan that!
Pluto is tiny. Earth is 12,756 km in diameter, Pluto is only about 2,390 km. That is only about 70% the size of the Moon (which is itself 1/4 the size of Earth.) In terms of Mass, Pluto only has about 1/460 of Earth's. Surface gravity of Pluto is only about 5% of Earth's.
Within the Solar System, Earth is the only planet with one moon - The Moon.
It happens all the time. Earth is the only planet with just one moon. Mars has two, Jupiter has 63 (probably more!) Saturn 15 or so, and Uranus and Neptune quite a few. Even tiny Pluto has three.
pink.