Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 167
time of the nightare they visible ? 15. What is the right ascension of the point on the celestial spheretoward which the earth is moving on June 21 ? 16. What are the altitude and azimuth of the point toward whichthe earth is moving to-day at noon ? At 6 p.m. ? At midnight ? At 6 A.M. ? 17. Observe… … Fig. 54. — The 40-inch telescope of the Yerkes Observatory.138 CHAPTER VTHE CONSTELLATIONS 74. Origin of the Constellations. — A moments obser-vation of the sky on a clear and moonless night shows thatthe stars are not scattered uniformly over its surface. Everyone is acquainted with such groups as…
Astronomy
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