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发表于 2022-12-8 11:07:53
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弹钢琴 发表于 2022-12-8 10:22$ y; f* c" c) P7 Y" S6 m7 h( c+ k
但在英文版中,这个“环”用了复数。
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"For a while, the two ripped-apart pieces were still connected ...
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$ M6 j) G& M. X- ]2 \3 C了解下“洛希极限”
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https://en.m.wikipedia.org/wiki/Roche_limit* F. T, a" ?" j/ A% {2 D0 A
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In celestial mechanics, the Roche limit, also called Roche radius, is the distance from a celestial body within which a second celestial body, held together only by its own force of gravity, will disintegrate because the first body's tidal forces exceed the second body's gravitational self-attraction.[1] Inside the Roche limit, orbiting material disperses and forms rings, whereas outside the limit, material tends to coalesce.- }$ x; B4 K" e8 U6 {* d
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Far from the Roche limit (white line), the mass is practically spherical.
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Closer to the Roche limit, the body is deformed by tidal forces.% g) c, v+ b0 n3 `5 ]3 ~
8 B: ?2 }$ W! n2 x) eWithin the Roche limit, the mass' own gravity can no longer withstand the tidal forces, and the body disintegrates.; J- w" f, o9 s# D4 p
( O$ O7 j, C/ J" S7 i$ Z* IParticles closer to the primary move more quickly than particles farther away, as represented by the red arrows.9 [+ K0 H# [) `, Y' d% M, Q! p
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The varying orbital speed of the material eventually causes it to form a ring. |
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