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。

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The process of planetary evolution is orderly and controlled.

行星进化的过程是有秩序和受控制的。

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Then again, you will find the evolution of the planetary motion, because the rate of change of the rate of the change of the position is connected to the position.

同样地,这就是行星运动的演化过程,因为行星位移的变化率的变化率,与它的位移有关

耶鲁公开课 - 基础物理课程节选

They started off with more than 1, 000 virtual Moon-sized objects made of rock and ice and simulated about 200 million years of planetary evolution.

BBC: NEWS | Science/Nature | Earth-like planets may be common

Although these data are valuable by themselves, experimental studies on these compositions enable scientists to reach the next level in the interpretation of planetary evolution.

FORBES: Mercury May Have Once Had An Ocean Of Lava