Part of a lost, ancient star catalog has now been found

Greek astronomer Hipparchus is thought to be the first to attempt to precisely map the stars

An illustration of Ancient Greek astronomer Hipparchus looking through a telescope at the night sky.

Ancient Greek astronomer Hipparchus, illustrated in his observatory in Alexandria, Egypt, was thought to have written the first star catalog. Now researchers have found part of it hidden in a medieval codex.

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Fragments of a star catalog from the second century B.C.