Because it is the furthest from the sun.
Pluto's orbit is longer and slower than other planets.
Pluto(i think)
It is a dwarf planet. It is smaller than the other planets.
Pluto is farther from the sun than any of the 8 major planets. There are other dwarf planets farther from the sun than Pluto though.
Pluto is a dwarf planet. It is smaller than the other planets. It also has a very irregular orbit.
Ganymede is the largest moon of Jupiter, it is bigger than mercury and also Pluto. Pluto is no longer a planet
The planets that are smaller than Venus are: Jupiter, Earth, Neptune, Uranus, and Saturn. Pluto is no longer on the list
Pluto has the longest orbit in length as it is further away from the sun than the other planets. If we model the orbit of all the planets as perfect circles, we can see that planets further from the sun give orbits which are larger circles, and larger circle have larger circumferences, which are the longer orbits. Even if the planets orbited at the same speed, Pluto would take longer to orbit as it has further to travel. Pluto doesn't orbit at the same speed as other planets - it orbits more slowly. This means it takes even longer to orbit the sun. It orbits more slowly as it is further out and the sun exerts less of a gravitational force on Pluto than on the other planets, and it is this gravitational force which causes objects to orbit around the sun. In fact, the sun exerts 1600 times as much force on Earth than on Pluto.
Mars is larger than Mercury and Pluto, theough the latter is no longer considered a planet.
Other than Pluto, they are all made of gas.
no
Yes. Sometimes Neptune is father away from the sun than Pluto. Pluto's orbit crosses Neptune's. None of the other seven planets ever get farther away from the sun that Pluto.