Kalmar gas giant an ƙirƙira shi ne a cikin 1952 ta marubucin almara na kimiyya James Blish kuma an fara amfani da shi ne don komawa ga dukkan taurari masu girma. Ana iya jayayya cewa wani abu ne na kuskure, saboda a cikin yawancin girman waɗannan taurari matsin lamba yana da girma sosai cewa al'amarin ba a cikin nau'in gas ba. Ban da sassan sama na yanayi da daskararru a cikin tsakiya, duk abin da ke sama da maɓallin mahimmanci, inda babu bambanci tsakanin ruwa da gas. Planet mai ruwa zai zama mafi daidaito. Jupiter kuma yana da hydrogen na ƙarfe kusa da cibiyarsa, amma yawancin girmansa shine hydrogen, helium, da kuma alamun sauran iskar gas sama da mahimmancin su.
quite bakin ciki idan aka kwatanta da radii