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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
4 T; Q7 {: k5 e7 X" x5 ]1 Q0 v但在英文版中，这个“环”用了复数。& P2 w# m0 e( `+ i4 K& D. {
$ t' C" s4 O/ a. n0 O+ n( ]"For a while, the two ripped-apart pieces were still connected ...
& N1 U( b& K, C; K/ I% h了解下“洛希极限”, w/ G9 I+ s# {: L3 F& S2 ^, ]
/ {6 G6 j: t) R0 Bhttps://en.m.wikipedia.org/wiki/Roche_limit
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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.) m5 Y1 P4 g* L% z
- |& c' x4 ~' p4 p0 }( Z+ f+ T! Y! BFar from the Roche limit (white line), the mass is practically spherical.. D- l' ~3 M' L- a
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Closer to the Roche limit, the body is deformed by tidal forces.
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Within the Roche limit, the mass' own gravity can no longer withstand the tidal forces, and the body disintegrates.
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2 G, Y* x- ]4 Q8 e5 jParticles closer to the primary move more quickly than particles farther away, as represented by the red arrows.
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The varying orbital speed of the material eventually causes it to form a ring. |
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