Usage of Noun 'Raqia'
nNoun used 17x in Bible
n11 of these refer to ‘firmament’ of heaven, which is the meaning in dispute;
n5 others refer to some object in Ezekiel’s vision, which may be solid, but this is not certain;
nThe other, Ps 150:1, may refer to the heavenly firmament, or to the ‘expanse’ of God’s power.
nIn any case, the noun refers to something expanded, whether solid or not, thick or thin, however it was spread out.