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== Known twin planet systems ==
== Known twin planet systems ==
[[Earth]] and [[Mondas]] were ''so'' similar that even the shapes of their landmasses were identical, albeit vertically flipped. Mondas had lifeforms identical to [[human]]s called [[Mondasian]]s ([[TV]]: ''[[The Tenth Planet]]'') and lifeforms identical to [[Silurian]]s called [[Lizard King]]s. ([[COMIC]]: ''[[The Dead Heart (comic story)|The Dead Heart]]'') Other examples include [[Atrios]] and [[Zeos]], ([[TV]]: ''[[The Armageddon Factor]]'') [[Androzani Minor]] and [[Androzani Major]], ([[TV]]: ''[[The Caves of Androzani]]'') [[Thoros Alpha]] and [[Thoros Beta]], ([[TV]]: ''[[Mindwarp]]'') [[Raxacoricofallapatorius]] and [[Clom]], ([[TV]]: ''[[Love & Monsters]]'') [[Gemino]] and [[Gemina]], ([[COMIC]]: ''[[The Secret of Gemino]]'') a system in the [[Tornado Nebula]], ([[TV]]: ''[[Sky (TV story)|Sky]]'') [[Antari Two]] and [[Antari Three]], ([[PROSE]]: ''[[First Frontier]]'') and [[Caludaar]] and [[Endarra]] ([[AUDIO]]: ''[[Scaredy Cat (audio story)|Scaredy Cat]]'')
[[Earth]] and [[Mondas]] were ''so'' similar that even the shapes of their landmasses were identical, albeit vertically flipped. Mondas had lifeforms identical to [[human]]s called [[Mondasian]]s ([[TV]]: ''[[The Tenth Planet]]'') and lifeforms identical to [[Silurian]]s called [[Lizard King]]s. ([[COMIC]]: ''[[The Dead Heart (comic story)|The Dead Heart]]'') Other examples include [[Atrios]] and [[Zeos]], ([[TV]]: ''[[The Armageddon Factor (TV story)|The Armageddon Factor]]'') [[Androzani Minor]] and [[Androzani Major]], ([[TV]]: ''[[The Caves of Androzani (TV story)|The Caves of Androzani]]'') [[Thoros Alpha]] and [[Thoros Beta]], ([[TV]]: ''[[Mindwarp (TV story)|Mindwarp]]'') [[Raxacoricofallapatorius]] and [[Clom]], ([[TV]]: ''[[Love & Monsters (TV story)|Love & Monsters]]'') [[Gemino]] and [[Gemina]], ([[COMIC]]: ''[[The Secret of Gemino (comic story)|The Secret of Gemino]]'') a system in the [[Tornado Nebula]], ([[TV]]: ''[[Sky (TV story)|Sky]]'') [[Antari Two]] and [[Antari Three]], ([[PROSE]]: ''[[First Frontier (novel)|First Frontier]]'') and [[Caludaar]] and [[Endarra]]. ([[AUDIO]]: ''[[Scaredy Cat (audio story)|Scaredy Cat]]'')


There were also other planets which were very similar. [[New Earth (New Earth)|New Earth]] was a planet which had the same orbit, size, atmosphere and terrain as [[Earth]]. ([[TV]]: ''[[New Earth (TV story)|New Earth]]'')
There were also other planets which were very similar. [[New Earth (New Earth)|New Earth]] was a planet which had the same orbit, size, atmosphere and terrain as [[Earth]]. ([[TV]]: ''[[New Earth (TV story)|New Earth]]'')
[[Category:Planets by type]]
[[Category:Planets by type]]
[[Category:Astronomy from the real world]]
[[Category:Astronomy from the real world]]

Revision as of 02:37, 5 February 2019

Binary planetary system

A binary planetary system, also known as twin or sister planets, were planets whose features were more or less identical, or at the very least similar, and were usually found nearby each other. This included the lifeforms which inhabited them.

Known twin planet systems

Earth and Mondas were so similar that even the shapes of their landmasses were identical, albeit vertically flipped. Mondas had lifeforms identical to humans called Mondasians (TV: The Tenth Planet) and lifeforms identical to Silurians called Lizard Kings. (COMIC: The Dead Heart) Other examples include Atrios and Zeos, (TV: The Armageddon Factor) Androzani Minor and Androzani Major, (TV: The Caves of Androzani) Thoros Alpha and Thoros Beta, (TV: Mindwarp) Raxacoricofallapatorius and Clom, (TV: Love & Monsters) Gemino and Gemina, (COMIC: The Secret of Gemino) a system in the Tornado Nebula, (TV: Sky) Antari Two and Antari Three, (PROSE: First Frontier) and Caludaar and Endarra. (AUDIO: Scaredy Cat)

There were also other planets which were very similar. New Earth was a planet which had the same orbit, size, atmosphere and terrain as Earth. (TV: New Earth)