translation.en: Okay, part one starts back in 1929 when the great astronomer Edwin Hubble realized that the distant galaxies were all rushing away from us, establishing that space itself is stretching, it's expanding.
translation.zh: 好吧，故事的第一部分回到1929年， 当伟大的天文学家爱德温•哈勃 意识到，遥远的星系 都匆匆离我们而去 建立属于它自身的空间 这个空间在不断地扩展。