Editing 2-2-0 (section)

{{Short description|Locomotive wheel arrangement}}
{{Infobox steam wheel arrangement
| name             = 2-2-0 (Planet)
| image            = Planet replica.jpg
| alt              = 
| caption          = Replica of the ''Planet'' at the Manchester Science Museum
| image2           = 
| caption2         = 
<!--Equivalent classifications-->
| hatnote          = 
| UIC/Germany/Italy= 1A
| French/Spanish   = 110
| Turkish          = 12
| Swiss            = 1/2
| Russian          = 1-1-0
<!--First tank engine version-->
| date             = 
| country          = 
| locomotive       = 
| railway          = 
| designer         = 
| builder          = 
| evolvedfrom      = 
| evolvedto        = 
| mainbenefit      = 
| maindrawback     = 
<!--First tender engine version-->
| date2            = 1830
| country2         = United Kingdom
| locomotive2      = ''[[Planet (locomotive)|Planet]]''
| railway2         = [[Liverpool and Manchester Railway]]
| designer2        = [[Robert Stephenson]]
| builder2         = 
| evolvedfrom2     =
| evolvedto2       = 
| mainbenefit2     = 
| maindrawback2    = Worse adhesion without coupled wheels
<!--First "True type" version-->
| date3            = 
| country3         = 
| locomotive3      = 
| railway3         = 
| designer3        = 
| builder3         = 
| evolvedfrom3     = 
| evolvedto3       = 
| mainbenefit3     = 
| maindrawback3    = 
}}
[[File:Макет пароходного дилижанса Черепановых.jpg|thumb|250px|Model (2002) of the steam locomotive constructed in Russia by the [[Cherepanovs]] (1834)]]
[[File:L&MR Planet class, 1830 (Boys' Book of Locomotives, 1907).jpg|right|thumb|250px|Bury 2-2-0 for the London and Birmingham Railway]]

Under the [[Whyte notation]] for the classification of [[steam locomotive]]s, '''2-2-0''' represents the [[wheel arrangement]] of two [[leading wheel]]s on one axle, two powered [[driving wheel]]s on one axle, and no [[trailing wheel]]s. This configuration, which became very popular during the 1830s, was commonly called the '''Planet''' type after the first locomotive, [[Robert Stephenson]]'s ''[[Planet (locomotive)|Planet]]'' of 1830.