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physical phenomena > process > physical process > motion > mass motion > contraction > collapse > free-fall |
free-fall comparison table |
Subject | is a kind of | has definition |
---|---|---|
collapse | contraction | Sudden contraction of a celestial body |
free-fall | collapse | A collapse in which gas clouds do not hit or impede one another. According to ELS, the Galactic halo formed in a free-fall collapse. |
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