You can consider a dwarf planet to be a special case from an asteroid - one that has achieved hydrostatic equilibrium, which basically means that it has enough gravity to force it into a round shape.
Generally it's the size. If an asteroid were to be big enough to achieve hydrostatic equilibrium (approximately spherical in shape), then it may be classed as a dwarf planet, such as Ceres. Asteroids are generally too small to active this shape under their gravity so are not classed as dwarf planets.
There is only one factor that makes Pluto different from major planets:Pluto has not cleared its "neighborhood" of asteroids and debris.
Dwarf planets are not a special type of planet. A small planet is later classified a dwarf planet. The only characteristic that makes it a dwarf planet is the size. Your question should be why are some planets small?
What makes a moon a moon is the fact that it is smaller than the object it is orbiting, and is orbiting the object (the planet) constantly.The definition of a moon is "a natural satellite revolving around a planet". Since a satellite is an object that orbits a bigger object, usually a planet, and is not a planet due to its small size, it is considered a moon and not another planet.
The largest object in the asteroid belt is Ceres at about 580 miles across. It is classified as a dwarf planet rather than an asteroid.
Generally it's the size. If an asteroid were to be big enough to achieve hydrostatic equilibrium (approximately spherical in shape), then it may be classed as a dwarf planet, such as Ceres. Asteroids are generally too small to active this shape under their gravity so are not classed as dwarf planets.
It is in between the Kuiper Belt and the Oort Cloud
Moons orbit planets. Planets (and dwarf planets) orbit stars.
rocks and stones also asteroids and meteroids
There is only one factor that makes Pluto different from major planets:Pluto has not cleared its "neighborhood" of asteroids and debris.
Pluto is made of mainly Nitrogen and Methane, and its atmosphere consists of Nitrogen, some methane, carbon monoxide, and ethane. Pluto's surface temperature is about 44 degrees Kelvin. Pluto's diameter is about 2,340 km or 1,454 miles.Dwarf planets are made up of the same things as other planets except they are smaller.
Dwarf planets are not a special type of planet. A small planet is later classified a dwarf planet. The only characteristic that makes it a dwarf planet is the size. Your question should be why are some planets small?
Our solar system is made of the planets, the sun(which is our star), asteroids, moons, comets. In our Solar System we also have the planets, Mercury, Venus,Earth,Mars,Jupiter,Saturn,Uranus and Neptune.
The number of dwarf planets constantly changes because new objects in the solar system are being discovered and classified. These objects need to meet certain criteria to be considered dwarf planets, so as our technology and understanding of the universe improve, the number of known dwarf planets can increase or decrease.
The four terrestrial planets (Mercury, Venus, Earth and Mars, the three moons (The Moon, Phobos & Deimos)) and the asteroids.
Gravity
It's smaller and colder