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nebular hypothesis comparison table |
Subject | see also | is a kind of | has definition |
---|---|---|---|
outdated belief | belief | ||
nebular hypothesis | island universe hypothesis | outdated belief | Hypothesis, maintained in the nineteenth and early twentieth century, that the spiral nebulae are not galaxies but are instead whirlpools of gas from which new systems of stars and planets are condensing. Compare island universe theory. |
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