A beginner's star-book; an easy guide to the stars and to the astronomical uses of the opera-glass, the field-glass and the telescope . as either of its companions, and yet—if the night be clear—these three almost equidistant points of light form one of the finest landmarks of theSummer sky. By 9 on June 1st we shall find Altair at position A; at position B by 12:30 ;at C by 4 ; at D by 7 , though lost in daylight. Or, preferring to watch itmarching through the months rather than through all hours of a single night, we mayobserve it during the early evenings of June at positio
A beginner's star-book; an easy guide to the stars and to the astronomical uses of the opera-glass, the field-glass and the telescope . as either of its companions, and yet—if the night be clear—these three almost equidistant points of light form one of the finest landmarks of theSummer sky. By 9 on June 1st we shall find Altair at position A; at position B by 12:30 ;at C by 4 ; at D by 7 , though lost in daylight. Or, preferring to watch itmarching through the months rather than through all hours of a single night, we mayobserve it during the early evenings of June at position A, during the early evenings ofJuly and August as it advances from A to B; and during the early evenings of September,October, and November from B to C and from C to D. But there are two other groups in the sky, through practically the same hours, to whichI would now call your attention. Altair and its two companions point—like a straightsign-post—in two directions. As they point upward we shall find them guiding us inthe general direction of Vega, the white splendid star of the constellation Lyra. It is n ;»^«: T. ^. y ^ FOUR POSITIONS OF ALTAIR distant from Altair about twice as far as the distance between Corvus and Spica (nowsouthwest as Altair rises) or thirty degrees. As Altair moves toward position B, Vegaalso will be found so much higher in the sky that, as we continue to face south, we shallhave to undergo some discomfort in looking up at it. But toward this brighter star,Altair still makes, with its two , the same shining pointer from every positionand at every hour. And this pointer directs us downward as well as upward. By the time Altair reachesposition B, we shall see—by looking closely—that there is below it at a distance of a littleover 20 degrees a dim group of rather small stars,—the constellation Capricornus. It iscalled the Sea-goat, but it looks as little like a goat as Corvus looks like a Raven. Justbecause its stars are not br
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Keywords: ., bookcentury1900, bookdecade19, booksubjectastronomy, bookyear1912
