Before Tianwen l, no country had ever tried to send an orbiter, a lander and a rover in one single expedition to Mars.

在“天问一号”之前，没有国家尝试过在单次火星探测中发射轨道飞行器、着陆器和探测器。

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Relative size of the inner planets of the solar system (from l-r) : Mercury, Venus, Earth, and Mars.

太阳系内部行星的相对体积(拍自1 - r)：水星、金星、地球和火星。

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Relative size of the inner planets of the solar system (from l-r) : Mercury, Venus, Earth, and Mars. New research supports the idea that Mars owes its small size to its relatively rapid formation.

太阳系内部行星的相对体积(拍自1 - r)：水星、金星、地球和火星。

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Relative size of the inner planets of the solar system (from l-r) : Mercury, Venus, Earth, and Mars. New research supports the idea that Mars owes its small size to its relatively rapid formation.

太阳系内部行星的相对体积(拍自1 - r)：水星、金星、地球和火星。

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