To Aratus is due the credit of having made the Achaean League an effective instrument against tyrants and foreign enemies.
After several unavailing attempts Aratus contrived to win Argos for the Achaean League (229), in which it remained save during a brief occupation by the Spartans Cleomenes III.
It is also a constellation, mentioned by Eudoxus (4th century B.e.) and Aratus (3rd century B.C.), and catalogued by Ptolemy, 25 stars, Tycho Brahe 25, and Hevelius 38.38.
Century B.C.) and Aratus (3rd century B.C.); Ptolemy and Tycho Brahe catalogued 28 stars, Hevelius gave 29.
Considerable fragments from a juvenile translation of Aratus have been preserved.
In 243 Corinth was freed by Aratus and incorporated into the Achaean league.
BOOTES (Gr.) 30wrns, a ploughman, from soils, an ox), a constellation of the northern hemisphere, mentioned by Eudoxus (4th century B.C.) and Aratus (3rd century B.C.), and perhaps alluded to in the book of Job (see Arcturus), and by Homer and Hesiod.
Of Macedon came to expel these marauders, Aratus became the king's adviser, and averted a treacherous attack on Messene (215); before long, however, he lost favour and in 213 was poisoned.
At this point Aratus appealed to Sparta to help the Achaeans in repelling an expected Aetolian attack, and Agis was sent to the Isthmus at the head of an army.
Ever anxious to extend the league, in which after 245 he was general almost every second year, Aratus took Corinth by surprise (243), and with mingled threats and persuasion won over other cities, notably Megalopolis (233) and Argos (229), whose tyrants abdicated voluntarily.