- the discredited theory that the close passage of a star to the sun caused many small bodies (planetesimals) to be drawn from the sun, eventually coalescing to form the planets
| 单词 | planetesimal hypothesis |
| 释义 | Collins Concise English Dictionary © HarperCollins Publishers:: planetesimal hypothesis /ˌplænɪˈtɛsɪməl/ n
plan•e•tes•i•mal (plan′i tes′ə məl),USA pronunciation [Astron.] n.
adj.
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