OAO-2 to ropo re se akiyesi oninuaro awon irawo ati galaksi lati igba igbera re ni 1968 titi di 1972, eyi pe ju odun kan ti won gbero fun lo.Awon iranlose OSO ati OAO fihan bi awon akiyesi ibudo ofurufu se se pataki si ninu itorawo, bo si se di 1968, NASA sagbedide awon eto gidi fun teliskopu alatanpada pelu jigi ti idakoja re je 3 m, to je mimo nigba naa bii Large Orbiting Telescope tabi Large Space Telescope (LST), ti yio gbera ni 1979.. 
Ìrójinily, this device was mis-tòmátì, resulting in an extremely prejáde (but wrong) shape for the Mirror.. 