Based on current theories of planetary evolution, any extraterrestrials observing the solar system 4 billion years ago would have seen oceans on Venus, Earth, and Mars.
基于现在星球进化的理论，四十亿年前任何外星人观察太阳系都会发现在金星，地球和火星上有海洋存在。
These gravitational effects have a subtle, but apparently significant influence on the evolution of planetary orbits in the solar system.
这些引力作用对太阳系行星轨道的演变具有微妙而又明显重要的影响。
The isotopic composition of solar system is the base for studying the origin and evolution of the solar system.
太阳系原始同位素组成是研究太阳系起源和演化的基础。
Each planet in the solar system in different stages of the evolution process of the planet, with different characteristics.
太阳系各行星都处在行星演化进程的不同阶段，具有不同的特征。
Each planet in the solar system in different stages of the evolution process of the planet, with different characteristics.
太阳系各行星都处在行星演化进程的不同阶段，具有不同的特征。
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