Pluto is different from the other planets, because it’s not classified as a gas giant planet, or a terrestrial planet. The reason pluto is not considered a either of these is, because it has too small of a density to be considered a terrestrial planet, and is made up of rock, and ice, and no gas.

So inconspicuous that it was not discovered until 1930, Pluto is not a gas giant planet like all the others in the outer solar system. Instead it is a small, rocky world about the size of Earth’s Moon.

Chemical composition: Pluto probably consists of a mixture of 70 percent rock and 30 percent water ice. Internal structure: The dwarf planet probably has a rocky core surrounded by a mantle of water ice, with more exotic ices such as methane, carbon monoxide and nitrogen ice coating the surface.

The surface of Pluto is a thin layer of nitrogen, methane and carbon monoxide. When Pluto is at its closest to the Sun, this material evaporates, and forms an atmosphere around the dwarf planet. And then, when it’s further from the Sun, and cooler, this atmosphere freezes back down onto the surface.

Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more.

Pluto is thought to be made of mostly ice. It probably also has a small rocky core which might contain some metals. The ice on the surface of Pluto is made of frozen nitrogen, methane and carbon monoxide.

More than 98 percent of Pluto’s surface consists of solid nitrogen, with traces of methane and carbon monoxide. The face of Pluto oriented toward Charon contains more solid methane, whereas the opposite face contains more nitrogen and solid carbon monoxide.

Pluto is much smaller than all the terrestrial planets (and even smaller than many of the big moons of the giant planets). Its composition is ice and rock as opposed to the composition of rock and metal of the terrestrial planets.

The bright, red regions were thought to be caused by molecules known as tholins, which are organic compounds that rain down onto the surface after cosmic rays or ultraviolet light interact with the methane in Pluto’s surface and atmosphere. To the left of Pluto’s heart-shaped plain is the mud red Cthulhu Macula.

Like the other gas giants, Uranus lacks a solid, well-defined surface. Instead, the gas, liquid, and icy atmosphere extends to the planet’s interior. Uranus is the second least dense planet in the solar system, indicating that it is made up mostly of ices.

A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, with a relatively small rocky core. The gas giants of our solar system are Jupiter, Saturn, Uranus and Neptune.

There were many reasons why Pluto got demoted to dwarf planet status, one of which was that it couldn’t clear its orbit of asteroids and other debris.

Pluto is now classified as a dwarf planet. A dwarf planet is a planet like object that orbits the sun, has enough mass that its shape is influenced by gravitational forces than mechanical ones but is small that it cannot clear its neighborhood. Pluto shares more features with comet than a planet.

Pluto has been reclassified as a dwarf planet. It was reclassified as such because a growing number of objects were found similar to Pluto, which exhibited at least one notable difference from the other planets. The choice would have been to accept these other objects as planets or to develop a new class of object.

Because it has not cleared the neighborhood around its orbit, Pluto is considered a dwarf planet. It orbits in a disc-like zone beyond the orbit of Neptune called the Kuiper belt , a distant region populated with frozen bodies left over from the solar system’s formation.