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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
) X1 t2 T7 D8 V# p2 r1 H: H% ~但在英文版中,这个“环”用了复数。7 U0 ^5 ]. U9 p/ l' @- I7 M0 R
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"For a while, the two ripped-apart pieces were still connected ...
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了解下“洛希极限”
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( T d6 }9 Y7 Y. k& lhttps://en.m.wikipedia.org/wiki/Roche_limit" J. K( k* C" i# c- l' w
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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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Far from the Roche limit (white line), the mass is practically spherical.
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8 V+ l- a5 n; f- v: r8 e7 j5 n! ?Closer to the Roche limit, the body is deformed by tidal forces.; B0 {, c: F# `: P- g
7 A8 j5 n4 r4 L$ x/ L: |4 A" ~- E3 e. k5 ^Within the Roche limit, the mass' own gravity can no longer withstand the tidal forces, and the body disintegrates.: p2 y' t& r: c" p% p/ ^+ Y" v
6 b9 a8 @8 S0 h9 X' c; NParticles 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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