. Astronomy for high schools and colleges . westof Aquila, while its head and body are formed of a col-lection of stars of the third and fourth magnitudes, ex-tending north of Scorpius nearly to Bootes. Hercules is a verylarge constellationbetween CoronaBorealis and is now in thezenith, but containsno bright stars. Ithas, however, anumber of interest-ing telescopic ob-jects, among themthe great cluster ofHercules, barelyvisible to the nakedeye, but containing an almost countless mass of stars. The head of Draco^already described, is just north of Hercules. Constellations Visible at O H
. Astronomy for high schools and colleges . westof Aquila, while its head and body are formed of a col-lection of stars of the third and fourth magnitudes, ex-tending north of Scorpius nearly to Bootes. Hercules is a verylarge constellationbetween CoronaBorealis and is now in thezenith, but containsno bright stars. Ithas, however, anumber of interest-ing telescopic ob-jects, among themthe great cluster ofHercules, barelyvisible to the nakedeye, but containing an almost countless mass of stars. The head of Draco^already described, is just north of Hercules. Constellations Visible at O Hours of Sidereal Time. --This time will occur on October 1st at , onNovember 1st at , on December 1st at ,and on January 1st at In this position, the Milky Way appears resting in theeast and west horizons, but in the zenith it is inclinedover tow^ard the north. All the constellations, either inor north of its course, are among those already shall therefore consider only those in the Fig. 120.—SAGITTARIUS, THE ARCHER. 434 ASTRONOMY, Pegasus, the Flying Horse, is distinguished by fourstars of the second magnitude, which form a large squareabout 15° on each side, called the square of Pegasus. Theeastern side of this square is almost exactly on the meri-dian. Andromeda is distinguished by a row of three or fourbright stars, extending from the north-east corner ofPegasus^ in the direction of Perseus. Cetus, the Whale, is a large constellation in the southand south-east. Its brightest star is /? Geti, standingalone, 30° above the horizon, and a little east of themeridian. Piscis Australis, the Southern Fish, lies further westthan Cetus. It has the bright star Pomalhaut, about15° above the horizon, and an hour west of the meridian. § 5. NUMBERING AND CATALOGUING THE STARS. As telescopic power is increased, we still find stars offainter and fainter light. But the number cannot go onincreasing forever in the same ratio as
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