Ku dhammee weedha soo socota: Inta aan la ogayn in galaxyada wareega ay ka jiraan meel ka baxsan Milky Way galaxyadeena, waxaa badanaa loogu yeeri jiray "nebulae wareega". Su'aasha ah in waxyaabaha noocaas ah ay ahaayeen galaxyada gooni gooni ah oo ka madax banaan Milky Way, ama nooc ka mid ah nebula jira gudahood our galaxy u gaar ah, wuxuu ahaa mawduuca of
Dooddii Weyneyd ee 1920, oo u dhaxeysay Heber Curtis oo ka tirsan Lick Observatory iyo Harlow Shapley oo ka tirsan Mt. Xarunta kormeerka ee Wilson. Laga soo bilaabo 1923, Edwin Hubble wuxuu arkay Cepheid variables dhowr nebula spiral ah, oo ay kujirto waxa loogu yeero "Andromeda Nebula", isagoo cadeeyay in ay yihiin, run ahaantii, galaxyada oo dhan oo ka baxsan kuweena. Ereyga "Nebula spiral" tan iyo markaas lama isticmaalin.