solar nebula

Ca-, Al-rich inclusions ( CAIs) are the earliest assemblages of the solar nebula, and they contain information of early solar nebula. They are the probe of studying the origin and evolvement of early solar nebula, and are mainly found in carbonaceous chondrites.

富Ca、Al包体（CAI）是太阳星云最早期各种热事件的产物，保存了大量原始星云的信息，是研究星云形成和演化的探针，它们主要出现在碳质球粒陨石中。

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Solar system originated as a result of double spiral nebula synthesis

太阳系起源双螺旋星云复合成因说

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In order to reasonably explain the origin relation between meteorites, Earth and terrestrial planets, to discuss the Earth's source and estimate earth's bulk composition, it is necessary to set up a Petrological model for condensation process of solar nebula in terrestrial planet region.

建立类地行星区太阳星云凝聚过程的岩石学模型，对于合理解释陨石、地球和类地行星的成因关系，探讨地球起源和估算地球的整体成分都有着重要意义。

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Methods of research on formation and evolution of the solar nebula

太阳系形成及演化研究方法

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Based on the studies of meteorites, the authors introduce the formation and evolution of the solar system, including condensation, heating and alteration in the solar nebula, thermal metamorphism, igneous fractionation and shock metamorphism in parent bodies of meteorites.

通过对陨石的研究，说明太阳系的形成与演化历史，包括太阳星云的凝聚过程、高温加热熔融事件和低温蚀变过程，陨石母体的热变质作用、熔融分异作用以及冲击变质作用等。

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But a few grains have survived from the primitive nebula that the solar system condensed from.

但是一些颗粒是来自于凝成太阳系的原始星云.

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