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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
5 K6 F& A2 H( k! P但在英文版中,这个“环”用了复数。
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5 v, a0 _. T5 h- d( y7 B"For a while, the two ripped-apart pieces were still connected ... ; w% `+ W8 Y- g/ I. R* y, l
) R& m, q/ E4 |8 w8 d3 {了解下“洛希极限”- p4 ^/ N6 ?; m% q" }9 t, j- z
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https://en.m.wikipedia.org/wiki/Roche_limit+ |1 n9 |$ z& B) \( \3 S
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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.
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1 I! V! }. r. a& g+ m- w+ q% v0 nFar from the Roche limit (white line), the mass is practically spherical.: _+ y9 z* |! Z( E1 U% R
: G9 v- I/ g* R4 ]- S$ ~Closer to the Roche limit, the body is deformed by tidal forces.
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/ _6 E: L5 A: T# L% VWithin the Roche limit, the mass' own gravity can no longer withstand the tidal forces, and the body disintegrates.5 x* @9 Y$ n4 l1 [) `& R
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Particles closer to the primary move more quickly than particles farther away, as represented by the red arrows.
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( [% Z5 K3 |4 R: _1 v1 V$ xThe varying orbital speed of the material eventually causes it to form a ring. |
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