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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 10:222 {/ z7 C# w/ b' W7 ]3 m
但在英文版中,这个“环”用了复数。- ]) S# L2 G: M7 W# K; U
# f: W1 x9 \1 b6 F! ]1 b* z% q6 M"For a while, the two ripped-apart pieces were still connected ...
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) j" {4 t: n/ [7 \ h0 {. F了解下“洛希极限”
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/ x6 H2 e# _1 k0 x5 vhttps://en.m.wikipedia.org/wiki/Roche_limit
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# ^% m# b6 W2 M$ l6 CIn 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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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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! x' A" G2 S; t: q+ Q" y, c5 PParticles closer to the primary move more quickly than particles farther away, as represented by the red arrows.
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( g7 L" V) r* _The varying orbital speed of the material eventually causes it to form a ring. |
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