| 释义 |
Definition of Roche limit in English: Roche limit(also Roche's limit) nounrəʊʃrōSH Astronomy The distance within which the gravitational field of a large body is strong enough to prevent any smaller body from being held together by gravity. Example sentencesExamples - At a certain distance near a planet, known as the Roche limit, an object can be literally pulled apart by gravity.
- Amalthea is not a rigid body, being inside the Roche limit; but its gravity is more than adequate to hold it together, being 6 times stronger than the forces pulling it apart.
- Phobos has a number of interesting surface features, including grooves that could be created by the gravity gradient of Mars - Phobos is within Mars's Roche limit - trying to tear the moon apart.
- A collision which would have ejected material less than the Roche limit would have formed only rings around the earth.
- The magic distance, within which a planet's tidal force exceeds the gravity holding together that kind of vagabond, is called the Roche limit - discovered by the nineteenth-century French astronomer Edouard Albert Roche.
OriginLate 19th century: named after Edouard Albert Roche (1820–83), French mathematician. Definition of Roche limit in US English: Roche limit(also Roche's limit) nounrōSH Astronomy The closest distance from the center of a planet that a satellite can approach without being pulled apart by the planet's gravitational field. 〔天文〕洛希极限 Example sentencesExamples - Phobos has a number of interesting surface features, including grooves that could be created by the gravity gradient of Mars - Phobos is within Mars's Roche limit - trying to tear the moon apart.
- A collision which would have ejected material less than the Roche limit would have formed only rings around the earth.
- At a certain distance near a planet, known as the Roche limit, an object can be literally pulled apart by gravity.
- The magic distance, within which a planet's tidal force exceeds the gravity holding together that kind of vagabond, is called the Roche limit - discovered by the nineteenth-century French astronomer Edouard Albert Roche.
- Amalthea is not a rigid body, being inside the Roche limit; but its gravity is more than adequate to hold it together, being 6 times stronger than the forces pulling it apart.
OriginLate 19th century: named after Edouard Albert Roche (1820–83), French mathematician. |