. Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere. star marks itsposition ? What causes change in the position of the celestial poles ? 342. What 184 APPAEENT MOVEMENTS OF THE STAES. points where the Earths axis prolonged would strike thecelestial sphere, varies also. 342. The Circumpolar Constellations.—One of the moststriking northern circumpolar constellations is Ursa Majoror the Great Bear (see Fig. 17, p. 30), also called CharlessWain and th
. Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere. star marks itsposition ? What causes change in the position of the celestial poles ? 342. What 184 APPAEENT MOVEMENTS OF THE STAES. points where the Earths axis prolonged would strike thecelestial sphere, varies also. 342. The Circumpolar Constellations.—One of the moststriking northern circumpolar constellations is Ursa Majoror the Great Bear (see Fig. 17, p. 30), also called CharlessWain and the Plough. Seven bright stars in this con-stellation (connected by lines in Fig. 17) form what iscalled the Great Dipper, three making the handle andfour the bowl. The two stars of the bowl which arefarthest from the handle (Merak and Dubhe) are called thePointers, because the straight line which connects thempoints very nearly to the north pole, in whatever positionthe constellation may be. This will be seen from Fig. 74. The Pole-star, readily found with the aid of the Point-ers, is at the extremity of the tail of the Little Bear, andunites with six other stars of that constellation to form. Fig. 73.—The Northern Circumpolar Constellations. the Little Dipper (see Fig. 73). This resembles the is one of the most striking of the northern circumpolar constellations ?How is the Great Dipper formed? What stars are called the Pointers,and why? In what constellation is the Pole-star? What does it help toform? Name the other more important northern circumpolar is Cassiopea sometimes called, and why? 343. What are the principal CIKCUMPOLAE CONSTELLATIONS. 185 Great Dipper in shape, but is smaller and formed of lessbrilliant stars. The other more important northern circumpolar con-stellations are Cassiopea, Cepheus, Camelopardalus, andDraco. Seven stars in Cassiopea form what may be fan*cied to be the outline of a chair (see Fig. 73), and hencethis constellation i
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectastronomy, bookyear18
