20 Stern of the ship sailed by Jason and the Argonauts in search of the golden fleece. Scorpius Scorpion JULY 15 Slayer of Orion, who sets when the Scorpion rises. The bull attacking Orion. MAY 10 Juno, jealous of Callisto, transformed her to a bear. MAY 20 Proserpina, daughter of Ceres, abducted by Pluto.
Many stars come in pairs or groups.
Double stars visible to the naked eye are not truly double, they merely look as though they are, because of an accidental alignment. A test of eyesight reportedly used by the Arabs is the pair of stars Mizar and Alcor, second from the end of the handle of the Big Dipper. Another good test of eyesight is Alpha Capricornus, in the summer and autumn sky. For more narrowly spaced double stars, it is convenient to measure separation in minutes of arc. One star that is right on the limit is epsilon Lyrae, next to Vega in the summer sky.