▁dep icted ▁in ▁television , ▁radio , ▁books , ▁com ic ▁books , ▁com ic ▁stri ps , ▁and ▁other ▁media ▁in ▁the ▁ 1 9 5 0 s . ▁ ▁The ▁stories ▁followed ▁the ▁advent ures ▁of ▁Cor b ett , ▁Ast ro , ▁and ▁Roger ▁Mann ing ▁( origin ally ; ▁later , ▁T . J . ▁Th ist le ), ▁cad ets ▁at ▁the ▁Space ▁Academy ▁as ▁they ▁train ▁to ▁become ▁members ▁of ▁the ▁Sol ar ▁Guard . ▁The ▁action ▁takes ▁place ▁at ▁the ▁Academy ▁in ▁class rooms ▁and ▁b unk rooms , ▁ab o ard ▁their ▁training ▁ship ▁the ▁ro cket ▁cru iser ▁Pol aris , ▁and ▁on ▁al ien ▁world s , ▁both ▁within ▁the ▁solar ▁system ▁and ▁in ▁orbit ▁around ▁nearby ▁stars . ▁ ▁Origin ▁Joseph ▁Gre ene ▁of ▁Gros set ▁& ▁Dun lap ▁developed ▁Tom ▁Cor b ett , ▁Space ▁Cad et , ▁inspired ▁by ▁the ▁Robert ▁A . ▁Hein lein ▁novel ▁Space ▁Cad et ▁( 1 9 4 8 ) ▁but ▁based ▁on ▁his ▁own ▁prior ▁work . ▁Gre ene ▁had ▁submitted ▁a ▁radio ▁script ▁for ▁" Tom ▁R anger " ▁and ▁the ▁" Space ▁Cad ets " ▁on ▁January ▁ 1 6 , ▁ 1 9 4 6 , ▁but ▁it ▁remained ▁un per formed ▁when ▁Hein lein ' s ▁novel ▁was ▁published . ▁Gre ene ▁then ▁re work ed ▁his ▁radio ▁script ▁into ▁a ▁script ▁for ▁a ▁daily ▁newspaper ▁advent ure ▁strip , ▁which ▁was ▁never ▁produced . ▁ ▁Television ▁ ▁Tom ▁Cor