Original: Chicago & London: University of Chicago Press 1989, 14–16 Nevertheless, a Chinese historian of astronomy, Xi Zezong, claimed that the Chinese astronomer Gan De observed one of Jupiter's moons in 362 BC, nearly 2 millennia earlier than Galileo.
Simplified: Chicago & London: University of Chicago Press 1989, 14-16. A Chinese historian of astronomy, Xi Zezong, claims that Chinese astronomer Gan De observed one of Jupiter's moons in 362 BC, nearly 2 millennia earlier than Galileo.