Just the one - called Earth
They are sometimes called "major planets" to distinguish them from the "minor planets" (the asteroids) and "dwarf planets" like Pluto.
the inner planets are sometimes called Terrestrial Planets
Actually Dwarf planets are planets which are very small in size and cannot be called planets but not as small to be called asteroids, so the name dwarf planets.
They are sometimes called minor planets (not mirror planets).They aren't planets really, but they are a bit like little planets orbiting the Sun.
Jovian planets.
Terrestrial planets.
Because they are in the asteroid belt. The planets that are outside of the asteroid belt are called the outer planets.
Objects that are smaller than planets are called "dwarf planets"; even smaller objects are called "asteroids".
solar system
the terrestrail planets
No. There are, however, many planets discovered by a spacecraft called Kepler and given designations such as Kepler-69c.