Editing Solar System (section)

== Structure ==
There are a few main parts of the Solar System. Here they are in order from the Sun, with the planets numbered, and [[dwarf planet]]s marked with letters.

=== Inner solar system ===
[[File:Terrestrial planet size comparisons.jpg|thumb|The inner planets. From left to right: [[Mercury (planet)|Mercury]], [[Venus]], [[Earth]], and [[Mars]]]]

The first four planets closest to the Sun are called the inner planets. They are small and dense terrestrial planets, with solid surfaces. They are made up of mostly rock and metal with a distinct internal structure and a similar size. Three also have an [[atmosphere]]. The study of the four planets gives information about [[geology]] outside the Earth. 

* [[Terrestrial planet|Terrestrial planets]] region contains the four planets closest to the sun, all are rocky planets
** '''(1)''' [[Mercury (planet)|Mercury]]
** '''(2)''' [[Venus]]
** '''(3)''' [[Earth]]
** '''(4)''' [[Mars]]
* [[Asteroid belt]] region contains;
** ''(a)'' [[Ceres (dwarf planet)|Ceres]] (the only '''[[dwarf planet]]''' in this region)
** [[Asteroid]]s

=== Outer solar system ===
[[File:Gas planet size comparisons.jpg|thumb|The outer planets: From left to right: [[Jupiter]], [[Saturn]], [[Uranus]], and [[Neptune]]]]
* [[Giant planet]]s region contains the four largest planets. Jupiter and Saturn are [[gas giant]]s, while Uranus and Neptune are [[ice giant]]s;
** '''(5)''' [[Jupiter]]
** '''(6)''' [[Saturn (planet)|Saturn]]
** '''(7)''' [[Uranus]]
** '''(8)''' [[Neptune]]

=== Trans-Neptune region ===
* [[Kuiper belt]] region contains;
** ''(b)'' [[Pluto]]
** ''(c)'' [[90482 Orcus|Orcus]]
** ''(d)'' [[Haumea (dwarf planet)|Haumea]]
** ''(e)'' [[Makemake (dwarf planet)|Makemake]]
** ''(f)'' [[Quaoar]]
** [[Kuiper belt|Kuiper belt objects]] and possibly other dwarf planets
** short-period [[comet]]s
* [[Scattered disc]] region contains;
** ''(g)'' [[90377 Sedna|Sedna]]
** ''(h)'' [[225088 Gonggong|Gonggong]]
** ''(i)'' [[Eris (dwarf planet)|Eris]]
** [[Scattered disc|Scattered disk objects]] and possibly other dwarf planets

=== Oort Cloud === 
The [[Oort cloud]] is separate from the '''trans-Neptune region''', and much farther out. It contains the long-period [[comet]]s.