The oldest map of the stars compiled by ancient Greek astronomer Hipparchus around 129 BC was only known from references in later work, but researchers have uncovered passages in a ancient manuscript that is 'the most authoritative to date.'Writings on the parchment, known as Codex Climaci Rescriptus, had been scrapped off and the manuscript re-used for centuries, but using imaging techniques the team was able to look back in time to 'a wealth of ancient astronomical information.'Scientists at the French National Center for Scientific Research (CNRS) also used the precision of Hipparchus' measurements and found they line up with the layout of stars in 129 BC, although only coordinates for the constellation Corona Borealis are legible.
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