伽利略坚信金星的蜕变与亮度和大小有关是因为它围绕着太阳运行，哥白尼学说也证实了这点。
Galileo became convinced that the correlation of phase with brightness and size was due to Venus orbiting the Sun, thus supporting the Copernican Theory.
也就是在那里，在哥白尼学说出现的1800年之前，阿里斯塔克确立了以太阳为中心的太阳系的假说，埃拉托色尼计算出了地球的周长。
It was there, 18 centuries before the Copernican revolution, that Aristarchus posited a heliocentric solar system and Eratosthenes calculated the circumference of the Earth.
伽利略通过观察证实了另一位伟大的天文学家哥白尼的学说是正确的，而且还证实了地球是围绕着太阳转的。
Galileo used his observations to show that Copernicus, another great astronomer, was right and that the earth moves around the sun.
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