对宇宙的认识春秋战国时期,天圆地方说遭质疑,慎到(约前395～约前315)提出“天体如弹丸,其势斜依”的天浑圆说。惠施(前370～前310)则猜想,大地为球形。汉代天文仪器如浑象仪等的制造达到高峰,张衡(78～139)提出宇宙是无限的。根据托勒密(Ptolemy,90～168)的看法,宇宙是有限的球形,而地球则居宇宙的中心。天空分为8层,第1天层 During the Spring, Autumn, and Warring States period, the Tianyuan district was questioned. Shen Tian (about 315 to 315, about 315) proposed that “the celestial body is like a projectile, and its potential depends on it.” Huishi (before 370-310) guessed that the earth is spherical. The manufacture of the Han dynasty astronomical instruments, such as the elephant imager, peaked. Zhang Heng (78-139) proposed that the universe is infinite. According to Ptolemy (90-168), the universe is a finite sphere, and the earth is at the center of the universe. The sky is divided into 8 layers, the first day