Newly discovered fragments of 2,200-year-old star coordinates—once thought lost—reveal the incredible skill of the ancient astronomer ... used by scientists to map objects in the sky.

Hipparchus, who's also known as the father of trigonometry, is often considered the greatest astronomer of ancient Greece. Parts of his star map appear ... Catalogue more accurate than Ptolemy's ...

While it is not 100 percent certain that Hipparchus is the source of this star map, some of the evidence of his authorship includes the precision of the ancient astronomer’s measurements.