Columbia Encyclopedia

Search results

500 results found

ring, in astronomy

(Encyclopedia)ring, in astronomy, relatively thin band of rocks and dust and ice particles that orbit around a planet in the planet's equatorial plane. All four of the giant planets in the solar system—Jupiter, S...

Egeria

(Encyclopedia)Egeria ējērˈēə [key], in Roman religion and mythology, goddess or nymph of fountains. Consort and adviser of King Numa, she was also identified with Diana and worshiped as a goddess of childbirth...

Aetius, Roman general

(Encyclopedia)Aetius, c.396–454, Roman general. At first unfriendly to Valentinian III, he later made his peace with Valentinian's mother, Galla Placidia, and was given a command in Gaul. An ambitious general, he...

Eutropius, Roman historian

(Encyclopedia)Eutropius yo͞otrōˈpēəs [key], fl. 4th cent. a.d., Roman historian, a protégé of the emperors Julian and Valens. His Breviarium ab urbe condita (10 books) is a summary of Roman history. ...

Valerian, Roman emperor

(Encyclopedia)Valerian (Publius Licinius Valerianus) vəlērˈēən [key], d. after 260, Roman emperor (253–60). He held important posts, both civil and military, under the emperors Decius and Gallus. After the s...

Browse by Subject