Proper noun
(Greek mythology) The Greek goddess of stars and justice; similar to Dike, equivalent to the Roman goddess Justitia.
(astronomy) The asteroid 5 Astraea.
Source: en.wiktionary.orgO'er yonder eastern hill the twilight pale Walks forth from darkness; and the God of day, With bright Astraea seated by his side, Waits yet to leave the ocean. Mark Akenside
Along with Astraea Redux, Dryden welcomed the new regime with two more panegyrics: To His Sacred Majesty: A Panegyric on his Coronation (1662) and To My Lord Chancellor (1662). Source: Internet