| 单词 | Kelvin-Helmholtz contraction |
| 释义 | Kelvin-Helmholtz contraction [`kel·vǝn `helm´hōlts kǝn´trak·shǝn] ASTROPHYSICS A contraction of a star once it is formed and before it is hot enough to ignite its hydrogen; the contraction converts gravitational potential energy into heat, some of which is radiated, with the remainder used to raise the internal temperature of the star. |
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