Cohen 136, commonly called just "Cohen," is a binary star system in which the two suns, Cohen 136 A and Cohen 136 B, orbit near to each other. It is named after a tireless explorer of the Imperial era, who surveyed hundreds of systems in his long, mostly solitary life. (His legacy includes numerous uninhabited systems still designated "Cohen X" where X is some number.)

The system is noted as the location of three of the [[BTW/Twelve Worlds|Twelve Worlds]], and of the [[BTW/Capital Station|capital]] of the [[BTW/Allied Worlds|Allied Worlds]].

Links: New Europa VI -> New Iridia (Cohen 136 III); Cohen 136 V -> Thane (Thane I) 

||''Planet''||''Physical Description''||''Notes''||''Origin of Name''||
||Big Hell, Cohen 136 I||Rocky airless planet, partly molten.||--||Its unappealing nature.||
||Little Hell, Cohen 136 II||Hot, airless planet, cratered, recent ring system.||Some mining activity, mostly orbital.||Its unappealing nature.||
||''[[BTW/Iridia|Iridia]]'', Cohen 136 III||Rocky planet with extensive native metal and poisonous atmosphere.||Recolonized by New Iridia.||Marketing.||
||''[[BTW/New Iridia|New Iridia]]'', Cohen 136 IV||Unusually earth-like rocky planet||9.7 billion inhabitants.||After Iridia||
||[[BTW/Capital Station|Capital Station]]||Hollowed asteroid space station in high orbit.||3.8 million inhabitants||For being the capital of the AW||
||Cohen 136 V||Gas giant remnant.||Used by the Builders to create a wormhole.||Conventional||
||''[[BTW/The Water Planet|The Water Planet]]'', Cohen 136 V-3||Technically a large moon of the gas giant remnant.||Inhabited by Biran and some humans.||It's very wet.||
||Cohen 136 V -> Thane (Thane I) wormhole gate||--||--||Conventional.||
||Cohen 136 VI||Ice-giant.||--||Conventional.||
||Cohen 136 VII||Smallish ice-giant.||--||Conventional.||