Isithombe sibonisa umkhumbi omkhulu, onezinsika ezintathu uhamba phezu kolwandle olukhulu, oluluhlaza okwesibhakabhaka ngaphansi kwesibhakabhaka esigcwele izinkanyezi ebusuku. Amaseyili emikhumbi apheshulwa umoya, kanti uhlaka lwemikhumbi lunombala onsundu ngokumnyama. Umkhumbi uya ohlangothini lwesokudla lwesithombe, ushiya ngemuva umkhondo wegwebu elimhlophe phezu kwamanzi. Umkhumbi uzungezwe ukuvezwa kwemibala egqamile, okuhlanganisa izithunzi ezibomvana, ezinsomi, neziluhlaza okwesibhakabhaka, okubonakala sengathi kuphuma ku-nebula engemuva. I-nebula iyifu elikhulu, elimibalabala legesi nothuli, eliphakathi nendawo eluhlaza okwesibhakabhaka nombala obomvana-owolintshi. I-nebula isekhoneni eliphezulu kwesokudla sesithombe, okwenza umehluko ophawulekayo phakathi komkhumbi nolwandle.