Aryabhata, Indian astronomer and mathematician, comes up with concepts of mathematical equations, one of which explains the rotation of the Earth on its axis. This concept is far ahead of its time and he is fairly accurate in his description of it. He also comes with a lot of other ideas about the Solar System, but many of them are flawed because he considers the Earth to be the center of the universe. Aryabhata is often given credit for coming up with the number zero and using it as a placeholder.
Vitalian, Byzantine general, marches again to Constantinople. A fleet of 200 vessels sails from the Black Sea ports and blockades the entrance of the harbor capital. Emperor Anastasius I is disquieted by riots in the city, which cost many casualties, and decides to negotiate with Vitalian.
Vitalian accepts the receipt of ransom money and gifts worth 5,000 pounds of gold for the release of Hypatius, a nephew of Anastasius I who has been a prisoner since the attack at Acris (see 513). Vitalian retreats back to Lower Moesia.
July 9 – Emperor Anastasius I dies childless at Constantinople, age 88, after a 27-year reign in which he has abolished the sale of offices, reformed taxation, and perfected the empire's monetary system, but antagonized some with his heretical Monophysite religious policies. He is succeeded by Justin (Flavius Justinus), his comes excubitorum, commander of the palace guard. After his death, he leaves the imperial treasury richer by 23,000,000 solidi or 320,000 pounds of gold.