《三体》中关于“大撕裂”的一个景象描述没看懂

弹钢琴

情节是行星被撕裂成了两半，成了一个母体和一个伴体，两部分通过岩浆形成的一条河流“藕断丝连”，
, y% T9 w3 D# G' t+ c  e接着说”在行星周围形成了一个环“，这个描述不理解，怎么能形成一个”环“？想象不出来是一个什么样的景象

jonah_w

弹钢琴

jonah_w 发表于 2022-12-7 23:22

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; G8 X) c1 G2 x) O! E  c# O2 U( g0 e但在英文版中，这个“环”用了复数。
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, U- q& N) e  R8 J: k"For a while, the two ripped-apart pieces were still connected by streams of molten lava that coalesced into a space-spanning river. Then the lava cooled and turned into rings around the planets, but because of perturbations from the planets, the rings were unstable. The rocks that formed them fell back to the surface in a rain of giant stones that lasted several centuries.... Can you imagine what kind of hell that was?

entropy

弹钢琴 发表于 2022-12-8 10:22
1 K( y% v, _  {" Q' }; O但在英文版中，这个“环”用了复数。

  m& B5 Z  \# d) m6 C6 R: N"For a while, the two ripped-apart pieces were still connected ...

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了解下“洛希极限”

https://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.
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Far from the Roche limit (white line), the mass is practically spherical.
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3 v4 ~' K2 y4 G+ A+ sCloser to the Roche limit, the body is deformed by tidal forces.

5 F8 l8 p- _; R5 I- H. |7 W2 vWithin the Roche limit, the mass' own gravity can no longer withstand the tidal forces, and the body disintegrates.

Particles closer to the primary move more quickly than particles farther away, as represented by the red arrows.
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5 e8 ^( q( U$ |" JThe varying orbital speed of the material eventually causes it to form a ring.

winn

这个环是岩浆凝固形成的石块，后来又再次降落到行星上。本来就是想象的东西，不用看得太细。刘作家说，宇宙就像一本书，看得太认真让人痛苦，读得太快转眼就没了。还是让它慢慢进展吧。