77. Q. Give the names of two prominent stars in the constellation Perseus. A. Algenib and Algol.

78. Q. Name four of the more brilliant equatorial constellations, only a portion of whose paths is above our horizon. A. Andromeda, Orion, Cygnus, and Canis Major.

79. Q. Give the names applied to some of the groups of stars in the equatorial constellations. A. The Pleiades, the Great Square of Pegasus, the Belt of Orion, and the Milk Dipper.

80. Q. Name eight stars of the first magnitude in the equatorial constellations. A. Aldebaran, in Taurus; Capella, the Goat Star, in Auriga; Castor, in Gemini; Betelgeuse, in Orion; Sirius, the Dog Star, in Canis Major; Procyon, in Canis Minor; Spica, in Virgo; and Arcturus, in Boötes.

81. Q. What are some of the more remarkable sights in the southern circumpolar region of the sky? A. The constellations of the ship Argo and the Southern Cross, the Dark Hole, and the two Magellanic Clouds.

82. Q. How many stars are visible in the whole heavens to the naked eye? A. About five thousand.

83. Q. How many are there of each magnitude to the sixth? A. Twenty of the first, sixty-five of the second, two hundred of the third, four hundred of the fourth, eleven hundred of the fifth, and thirty-two hundred of the sixth.

84. Q. How many stars are there in the zone called the Milky Way? A. Eighty millions.

85. Q. How much of the light on a fine starlight night comes from stars that cannot be discerned by the naked eye? A. Three-fourths.

86. Q. How does the whole amount of starlight compare with that of the moon? A. It is about one-eightieth that of the moon.