what is the importance of southern skies
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The southern celestial hemisphere, also called the Southern Sky, is the southern half of the celestial sphere; that is, it lies south of the celestial equator. This arbitrary sphere, on which seemingly fixed stars form constellations, appears to rotate westward around a polar axis due to Earth's rotation.
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THIS little book is apparently intended as a companion to a star atlas for the use of those who have only small instrumental means for observation or no instruments at all. Although it refers almost exclusively in detail to the more remarkable objects of the southern hemisphere, the author has managed to interweave a good deal of interesting information which is applicable to the stars in general. The book opens with a brief account of the southern constellations, accompanied by a simple map, and this is followed by a series of chapters dealing with such subjects as “the ten brightest stars,” “eclipsing stars,” “star clusters,” and “the clouds of Magellan.” The descriptions of the various objects are notable for the numerous references to the results obtained by the use of the spectroscope, and in this connection it would have been an improvement to include either a photograph or a diagram illustrating the chief types of stellar spectra. A more generous supply of illustrations would also have been advantageous in other respects. Apart from this, the book will doubtless be welcomed by many readers, being brightly written and the facts well up-to-date. Those who have learned to recognise the stars, and have no special knowledge of astronomy, will find here just that little additional information which will help to maintain an intelligent interest in the wonders of the heavens.
Stars of the Southern Skies.
By M. A. Orr (Mrs. John Evershed). Pp. xii + 92. (London: Longmans, Green and Co., 1915.) Price 2s. net.
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