THE above constellations, which lie to either side of the great summer parade of star-figures which crosses the heavenly dome, will be called, for convenience in locating them, "the spectators."
The story of the "spectator" Ophiuchus, who is grasping Serpens (which is a separate constellation but usually mentioned in conjunction with Ophiuchus), has already been mentioned under the adventures of the giant Hercules, and that of Crater, the Cup and of Corvus, the Crow, will appear in connection with the Water-snake. The four large stars in the southern part of the sky—Spica, Antares, Formalhaut and Sirius—are, however, better taken in a group by themselves, for they are thus more easily remembered as large stars conspicuous in different seasons of the year in a region where large stars are scarce.
AQUILA, THE EAGLE
Aquila, the Eagle, was given a constellation not far below the Cross, at the edge of the Milky Way. This Eagle is designated as the Flying Eagle so as not to be confused with the Eagle which holds Lyra, the Harp. In mythology the eagle was supposed to be the bird of Jupiter because it could fly higher than other birds. This particular eagle stood by the throne in the palace on Mount Olympus and carried the thunderbolts in his claws.
"He, a bird, supplies the heavens with sacred bolts and arms the skies."
The Eagle pictured on the star maps is a very large bird, but the only portion of him not difficult to locate in the sky are the three bright stars which hang like a bar across his neck.
These stars alone suggest a bird flying with outstretched wings. This is a region of birds, for the great Cross with Cygnus, the Swan, drifts down the Milky Way between the two Eagles. The "three birds" are most effective and easily located when seen on the meridian in midsummer, for they then form a large triangle across the star stream, Lyra and Aquila being at the edges of the stream and at the base of the triangle with the center of the Cross at its peak.