Kepler's second law means that a planet's orbital speed changes with its distance from the sun.

开普勒第二定律指行星的轨道速度与其和太阳的距离。

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Kepler's second law means that a planet's orbital speed changes with its distance from the sun.

开普勒第二定律指行星的轨道速度与其和太阳的距离。

youdao