The Chinese historian Xi Zezong has claimed that Gan De, an ancient Chinese astronomer, discovered one of Jupiter's moons in 362 BC with the unaided eye.
Hiina astronoomiaajaloolane Xi Zezong väitis, et hiina astronoom Gan De avastas 362 eKr palja silmaga Ganymedese, ühe Jupiteri kaaslastest.