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 (1912)
Murphy, Edgar Gardner, 1869-1913 · New York, London, G.P. Putnam's sons · leaf 69
rger aper-ture, with a low-power eye-piece, will find them morereadily and permit a more satisfactory view of them.View also with such an eye-piece the clusters and nebula;M 17 [344I, M 20 I342I, and M 22 [343] in Sagittarius, aswell as those already mentioned. The cluster M 5 I371Iin Serpens forms… … NIGHT-CHART TO THE SKY AS THE OBSERVER FACES NORTH.SEPT. 1, 8 P.M., AUG. 15, 9 P.M., AUG. 1, 10 P.M.. JULY 15, 11 P.M., JULY 1, 12 P.M. FOR KEY-MAP TO THIS CHART SEE OPPOSITE PAGE. FOR THE SKY AS THE OBSERVER FACES SOUTH, SEE PP. 56, 57. For the sky at other Daces and Hours see Time Schedule, p.…
Astronomy
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