They can be classed as terrestrial planets or gas giants, or inner and outer.
The two ways are: Heterogeneous Homogeneous
Two ways are by temperature and brightness
There are currently five official dwarf planets: Pluto, Ceres, Eris, Makemake and Haumea.
elevation and shape
Public and Private
Fixed Bridges or Moveable Bridges
spectrum and temperature
It is both a vascular and living organism.
Six out of the eight planets in our solar system have moons. (Mercury and Venus are the only two that do not.)
It is extremely small and it has no rings!
See the link below for details about clouds classification.
The two planets farthest from the sun are Uranus and Neptune. Uranus is the seventh planet from the sun, while Neptune is the eighth planet. Both planets are classified as ice giants due to their composition of mostly ice and rock.