A Many ancient Greek scientists believed that Sun was literally at the center of the universe.

B The Hipparchus’s star catalog was created in 150 A.D.

C The concept, which Hipparchus used to create the first known star catalog, is still used by scientists to map objects in the sky.

D Hipparchus was a poet and “Phenomena” is his most famous poem. 

E The original Hipparchus’s catalog is available until nowadays.