17世纪,在以牛顿力学和万有引力定律的发现为标志的这一历史时期,人类对行星的研究常常被形容为对行星各层次研究的三部曲.三部曲的主角依次为第谷、开普勒和牛顿.一、第谷——用肉眼观测的天文学家第谷·布拉赫(Tycho Brahe,1546～1601),丹麦天文学家.他是最后一位也是最伟大的一位用肉眼进 In the historical period marked by the discovery of Newtonian mechanics and the law of universal gravitation in the 17th century, human studies of the planet were often described as a trilogy of studies at all levels of the planet. The protagonists of the trilogy were Tigu, Kai. Puller and Newton. I. Tycho – Astronomer Tycho Brahe (1546–1601) who was observed with the naked eye. Danish astronomer. He is the last and greatest person who enters with the naked eye.