[Roman figures refer to the chapters, Arabic to the articles.]
Satellites, vi. 121, 127, 129, 133; vii. 145, 150; viii. 154, 160, 162; ix. 170, 183–185; x. 210, 216; xi. 228, 248; xii. 253, 255, 267; xiii. 272, 283, 295, 296, 297, 318, 320. See also Jupiter, Saturn, etc., satellites of
Satellites, direction of revolution of, xi. 250; xiii. 295, 318
Satellites, rotation of, xi. 250; xii. 267; xiii. 297
Saturn, i. 14–16; ii. 25, 51; iv. 81, 87; v. 99; vi. 123; vii. 136 n, 142, 144; viii. 154, 156; ix. 183, 185, 186; x. 204; xi. 228, 231, 235, 236, 243–246; xii. 253, 267; xiii. 288, 297. See also the following headings
Saturn, mass of, ix. 185
Saturn, rings of, vi. 123; viii. 154, 160; xi. 228, 248; xii. 267; xiii. 295, 297
Saturn, rotation of, xii. 267; xiii. 297
Saturn, satellites of, viii. 154, 160; ix. 184; xi. 228; xii. 253, 255, 267; xiii. 295, 297, 307
Scientific method, ii. 54; vi. 134; ix. 195
Seas (on the moon), vi. 119; viii. 153; xiii. 296
Seasons, i. 3; ii. 35, 39; iv. 82; xi. 245
Second (angle), i. 7
Secular acceleration of the moon's mean motion, x. 201; xi. 233, 234, 240, 242; xiii. 287
Secular inequalities. See Inequalities, secular
Selenographia (of Hevel), viii. 153
Selenotopographische Fragmente (of Schroeter), xii. 271
Sequences, method of, xii. 266
Shadow of earth, moon. See Eclipses
"Shining-fluid" theory, xii. 260; xiii. 310, 311
Shooting stars. See Meteors
Short-period comets, xiii. 291
Sidereal month, ii. 40
Sidereal system, structure of, xii. 257, 258, 259–262; xiii. 317
Sidereal year, ii. 42
Sidereus Nuncius (of Galilei), vi. 119–122
"Sights," v. 110; viii. 155 x. 198
Signs of the zodiac, i. 13
Sine, ii. 47 n; iii. 59 n, 68 n
Sirius, xiii. 316 n
Solar eclipse. See Eclipse
Solar system, stability of, xi. 245; xiii. 288, 293
Solstices, i. 11; ii. 36, 39, 42
Solstitial points, i. 11
Space-penetrating power, xii. 258
Spanish astronomy, iii. 61, 66
Spectroscope, xiii. 299. See also Spectrum analysis
Spectrum, spectrum analysis, ix. 168; xiii. 273, 299–302, 303, 304, 306, 309, 311–314, 317, 318
Sphaera Mundi (of Sacrobosco), iii. 67
Sphere, attraction of, ix. 173, 182; xi. 228
Sphere, celestial. See Celestial sphere
Sphere, doctrine of the. See Spherics
Spheres, celestial, crystal. See Celestial spheres
Spheres, music of the, ii. 23; vii. 144
Spherical form of the earth, moon. See Earth, Moon, shape of
Spica, ii. 42
Spiral nebulae, xiii. 310
Stability of the solar system, xi. 245; xiii. 288, 293
