Astronomy

Put your information below or start a discussion Chinese observed and reported eclipses 1400-1200 BC Al-Mamum in 829 built larger quadrants and sextants than Tycho Brahe more than 700 years later Hindu Rig-Veda said gravity held the universe together 800 BC Indians 5th century AD - earth is 4.3 billion years old - 19th century UK gave 100 million years old. Chinese 4th century AD used fossils to study history of the planet Mesoamericans, including Maya, had a 260 day calendar 600 BC Sumerians catalogued brightest stars before 3000 BC Sumerians used a 360 day calendar
 * From Lost Discoveries by Dick Teresi (2002) Simon and Schuster**