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在许多中学物理乃至大学物理的各种教科书中,在论“光速”一节时,一般都要提到丹麦天文学家罗默利用木星的其中一颗卫星(下面简称木卫)发生周期性“月蚀”(即周期性被遮盖)周期的变化首次定量测定了光速这个历史事件。但对其中原理很少有详细清楚的叙述,因为太阳、地球、木星和木卫组成的系统(下面简称木卫系统)运动情况比较
In many textbooks for middle school physics and even university physics, when talking about the “speed of light” section, it is common to mention that the Danish astronomer Roemer periodically uses one of Jupiter’s moons The change in the period of the “lunar eclipse” (ie, periodically obscured) cycle quantified the historical event of light velocity for the first time. However, there are very few detailed and clear descriptions of the principles, because the movements of the system composed of the Sun, Earth, Jupiter, and Jupiter (hereinafter referred to as the “Islamic” system) are compared.