1. The “Geography” of the Solar System

2. Dwarf planets: Plutoids
Most dwarf planets are similar to Pluto.
They are called Pluroids
They orbit in the Kuiper Belt and in composition resemble comets.
(Although exactly what gas the ice is varies)
They Include: Pluto
Eris
Makemake
and Haumea
Some such as Sedna, Quaoar, Orcus and Varuna await a further observation

3. The terrestrial dwarf planet… Ceres
One Dwarf planet does have a composition similar to Earth…Ceres It was once considered an asteroid it orbits in the asteroid belt between Mars and Jupiter at 2.77 AU It is between 909 & 975km in diameter.

4. The Inner the Solar System
Closer to the Sun than Jupiter (< 5 AU) is the… Inner Solar System It consists of silicate & metal objects with no or a thin atmosphere such as the terrestrial planets, asteroids & Ceres

5. The“Outer” Solar System
From 5 AU to about 30 AU is the “Outer Solar System It consists of Giant Planets with thick atomspheres (Gas Giants) Ans a few Icy Asteroids

6. The Kuiper Belt
From AU is the Kuiper Belt, Ring shaped it is similar to the asteroid belt but populated by Thousands (millions?) of Icy objects like Comet nuclei and Plutoids

7. The Truly Outer Solar System
From 55 AU to 100,000 AU is a spherical cloud of Comet nuclei and Plutoids Numbering in the millions…. The Oort Cloud