| NOUN | cognition | planetesimal hypothesis | (cosmology) the theory that the solar system was formed by the gravitational accumulation of planetesimals |
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| Meaning | (cosmology) the theory that the solar system was formed by the gravitational accumulation of planetesimals. | |
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| Category | cosmology, cosmogony, cosmogeny | The branch of astrophysics that studies the origin and evolution and structure of the universe |
| Broader | scientific theory | A theory that explains scientific observations |
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