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.
beacuse ateroids are from the rocks the fall out of the sky ....
what makes it different is that the dwarf planets still orbit the sun, but asteroids don't orbit the sun.
space junk such as rocks and space rubble
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.
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?
Neptune lies beyond the asteroid belt, which makes it an outer planet.
The very distinct difference between Saturn and all the other planets is it has an Asteroid ring / belt. Saturn has its own asteroid belt and no other planet does.
A dwarf planet is not considered a planet because it does not dominate its orbital path and cannot clear that path of debris.
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.
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?
The largest known asteroid in the Solar System ... and it's extraordinarily unlikely that there are any unknown ones that are larger ... is 1 Ceres, which makes up about a third of the entire mass of the asteroid belt. Ceres is large enough to be rounded by its own gravity into "hydrostatic equilibrium" (basically defined as "the same shape a fluid body rotating at the same speed would take") but not large enough to have "cleared its orbit" of other bodies, which makes it a dwarf planet.
Neptune lies beyond the asteroid belt, which makes it an outer planet.
Moons orbit planets. Planets (and dwarf planets) orbit stars.
It makes it spherical.
The very distinct difference between Saturn and all the other planets is it has an Asteroid ring / belt. Saturn has its own asteroid belt and no other planet does.
A dwarf planet is not considered a planet because it does not dominate its orbital path and cannot clear that path of debris.
In order from least to greatest in mean radius:Vesta (protoplanet)Pallas (protoplanet)Charon+ (dwarf planet)Orcus (dwarf planet)Quaoar (dwarf planet)Ceres (dwarf planet)Sedna (dwarf planet)"Snow White" [2007 OR10]* (dwarf planet)Haumea* (dwarf planet)Makemake (dwarf planet)Pluto+ (dwarf planet)Eris (dwarf planet)Mercury (terrestrial planet)Mars (terrestrial planet)Venus (terrestrial planet)Earth (terrestrial planet)Neptune (ice giant)Uranus (ice giant)Saturn (gas giant)Jupiter (gas giant)*There is a slight discrepancy as to how Haumea ought to be measured, due to its unusual shape. This makes it slightly unclear as to which is considered larger between Haumea and "Snow White."+Binary planet
Pluto is too small to be considered a planet but since it has all other characteristics of a planet it is considered a dwarf planet .
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.
because scientists can't make up their mind about what makes a planet a planet.