Flyby Missions to Comets and Return Sample Analysis

被引：3
|
作者：
Brownlee, Donald E. [1 ]
Clark, Benton C., III [2 ]
A'Hearn, Michael F. [3 ]
Sunshine, Jessica M. [3 ]
Nakamura, Tomoki [4 ]
机构：
[1] Univ Washington, Dept Astron, Seattle, WA 98195 USA
[2] Space Sci Inst, Boulder, CO 80301 USA
[3] Univ Maryland, Dept Astron, College Pk, MD 20742 USA
[4] Tohoku Univ, Dept Earth Sci, Sendai, Miyagi 9808578, Japan
来源：
ELEMENTS | 2018年 / 14卷 / 02期
基金：
日本学术振兴会;
关键词：
comet; meteorite; asteroid; cosmic dust; interstellar; isotope; spacecraft; GIOTTO OBSERVATIONS; STARDUST AEROGEL; DUST PARTICLES; DEEP IMPACT; 81P/WILD; SYSTEMATICS; ORIGIN; GRAINS; EJECTA; HALLEY;
D O I：
10.2138/gselements.14.2.87
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Images from flyby missions show comets to be geomorphically diverse bodies that spew jets of gas, dust, and rocks into space. Comet surfaces differ from other small bodies because of their ejection of mass into space. Comet solids >2 mu m are similar to primitive meteorite ingredients and include the highest temperature materials made in the early solar system. The presence of these materials in ice-rich comets is strong evidence for large-scale migration of solid grains in the early solar system. Cometary silicates appear to have formed in numerous hot solar system regions. Preserved interstellar grains are rare, unless they have eluded identification by having solar isotopic compositions.
引用
收藏
页码：87 / 93
页数：7
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