Part 22

George III., Uranus first called Georgium Sidus after, 226.

Great Dipper, 73, 77, 84, 96, 104, 105, 186, 236.

Hamal, star in constellation of Aries, 78.

Herschel, discovery of Uranus by, 226–227, 232.

Hyades, the, 79.

Hyperion, satellite of Saturn, 222.

Inferior planets, 40.

Io, satellite of Jupiter, 200, 201.

Japetus, satellite of Saturn, 222.

Juno, planetoid, 251, 253.

Jupiter, color, 5; attraction between Saturn and, 15; distance from sun, 19; size and importance of, 20; movement, 25, 65; satellites, 34, 106, 199–205; long known, 38; superior planet, 41; space between Mars and, 42; influence on comets, 44; gibbous, 66; distance from ecliptic, 72; near Antares, 86; in Scorpio, 127; size and velocity, 183–185; place in sky, 186–190; distance, light, and heat, 190–193; seasons and atmosphere, 193–195; surface features, 195–199; symbol, 205; compared to Saturn, 213–214, 215–218; nearness of asteroids to, 244; how to recognize, 259–264.

Laplace, nebulæ hypothesis of, 28, 30.

Leo, constellation of zodiac, 76, 82–83, 91–92, 188, 211–212, 221.

Leverrier, discovery of Neptune by, 236–238.

Libra, constellation of zodiac, 76, 85, 91–92, 188, 212.

Little Dipper of the Pleiades, 79.

Lyre, constellation of the, 54.

Major planets, 19.

Mars, “eye” of, 12; distance from sun, 19; nearness to earth, 20; movement of, 25, 65; long known, 38; superior planet, 41; space between Jupiter and, 42; speed, 51; gibbous, 66; distance from ecliptic, 72; color, 80, 86, 259; position in regard to Antares, 87; density, 110; nearness to Venus, 128; variety in brightness, 151–152; how and where to identify, 152–162, 259–265; size, atmosphere, and temperature, 162–165; distance and brilliancy, 166–170; seasons, 170–171; surface aspect, 172–179; satellites, 180–181; symbol of, 182; nearness of asteroids to, 244; Bode’s law and, 245–246, 248–249; smallness, 260.

Mercury, 18; nearest planet, 19; unfavorable situation for observation, 20; easily recognized, 22; age of, 34; dense matter of, 37; long known, 38; inferior planet, 40; terrestrial planet, 41; irregularities of, 44–45; number of revolutions, 47; orbit, 48; apparent motions, 57–58; transits, 61; distance from ecliptic, 72–73; color, 80, 86; in Scorpio, 87; elusiveness of, 93–95; how to find, 96–100, 259; distance and brightness of, 101–105; size, 106–110; relation to sun, 111–118; transits, 119–121; lack of atmosphere, 144, 146; resemblance to Mars, 153; Bode’s law and, 245.

Milky Way, 87, 88, 89.

Mimas, satellite of Saturn, 222.

Minor planets, 19.

Mizar, star in Great Dipper, 105, 236.

Moon, 23; once called planet, 39; distance from ecliptic, 73.

Moulton, Professor, 178.

Neptune, discovery, 15; distance from sun, 19, 43; not visible to naked eye, 20; age, 34; diffuse matter of, 37; unknown to ancients, 40; superior planet, 41; influence on comets, 44; one revolution, 47; orbit, 48; movement of, 65; distance from earth, 234; discovery, 235–237, 247; symbol, 238; atmosphere, 239–240; satellite, 241; motion, 242; brightness, 243.

Oberon, satellite of Uranus, 232–233.