It is also shown that a structure, to be called "neck-line structure" (NLS), should appear in the dust tail of a comet after its perihelion passage. It is shown that the emergence and development of the NLS can provide an adequate explanation for the behaviour of the anomalous tail of ...
托福托福 63 - Structure and Composition of Comets 题目 收藏 6.According to paragraph 3, the tails of a comet A.flow in the same direction as the radiation that produces them B.become straighter as the comet moves away from the Sun
Iron and a few other heavy atoms, such as copper and cobalt, have been observed only in two exceptional objects: the Great Comet of 18823 and, almost a century later, C/1965 S1 (Ikeya–Seki)4,5,6,7,8,9. These sungrazing comets approached the Sun so closely that refractory materials ...
the origins of the three anisotropies have been determined. TA and HA thus determined inversely produce the following kinds of evidence and problems in the HMS: (1) the structure of the HMS, (2) acceleration of CRs on the boundary of the HMS, (3) CR Lens...
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Narrator: Listen to part of a lecture in an astronomy class. Professor: 0K.We have been looking at some of the smaller members of our solar system, comets.You already know about the structure of comets.Let's continue our discussion now by talking about orbits, especially those of the so...
head - a rounded compact mass; "the head of a comet" object, physical object - a tangible and visible entity; an entity that can cast a shadow; "it was full of rackets, balls and other objects" 18. head - the foam or froth that accumulates at the top when you pour an effervescent...
head - a rounded compact mass; "the head of a comet" object, physical object - a tangible and visible entity; an entity that can cast a shadow; "it was full of rackets, balls and other objects" 18. head - the foam or froth that accumulates at the top when you pour an effervescent...
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