Sagitta, constellation, 29, 129 Legend, 106, 129 Sagittarius, constellation, 133, 134 Legends, 131, 132, 133, 134 Saxe, 119 Satellites, 229, 297 Mars', 32, 267, 268 Jupiter's, 32, 141, 252, 253, 257, 258, 259 Saturn's, 32, 259, 276, 277 Uranus', 259, 282 Neptune's, 259, 284 Earth's, 297 Saturn, god, 20, 23 Saturn, planet, 6, 228, 229, 230, 232, 251, 260, 269, 271, 276 revolution, 270 rotation, 270, 275 diameter, 269, 270 seasons, 270 markings, 270 rings, 271, 272, 274, 275 density, 270 system of, 276 satellites, 32, 259, 276, 277 Satyrs, 17 Scarborough, Sir Charles, 98 Scales, The, 148, 149, 153 Scheat, 78 Schiaparelli, 262, 263 Schickard, lunar crater, 311 Scorpion, The, 27, 168 Scorpio, constellation, 29, 110, 153, 210 Antares, 3, 11, 13, 127, 145, 152, 153, 155, 156, 171, 185 Legend, 168 Sea-goat, 158 Sea, God of the, 21 Sea, Goddess of, 25 Sea-monster, 56, 57, 59, 69, 79, 80 Seas, lunar, 302, 303, 306 Sea of Fecundity, 306 Sea of Clouds, 303 Sea of Conflicts, 306 Sea of Nectar, 303, 306 Sea of Showers, 303 Sea of Tranquillity, 303 Segment of Perseus, 78, 192 Serviss, 111, 240 Serpent Bearer, The, 110 Serpens, constellation, 109, 110, 127 Legend, 109 Serpent, The, 27 Seven Sisters, 188 Shades, King of, 25 Shades, Queen of, 26, 151 Shaft of Altair, 129 Shaler, 291 Shapley, 113, 210 Shedir, 60 Shelley, 194 Shephards, ancient, 12 Shepherd's Star, 11, 138 Sickle of Leo, 87, 89, 241 Sighs, River of, 25 Signs of planets, 31, 32 Silver Age, 23, 148 Sirens, Three, 30 Sirius, 127, 140, 141, 142, 145, 148, 159, 160, 161, 162, 163, 164, 165, 181, 191, 197, 206, 210 Sky Dragon, 48 Sky Sea, 84, 158, 159 Sisyphus, 119 Small Dog, 180 Smith, 130 Sothis, 16 Southern Cross, 124, 134, 163, 208, 209 Southern Fish, 157, 209 Southern Pointers, 134, 209 Southern Pole, 210 Spangles, The, 176 Spectroheliograph, 213 Spectroscope, 39, 140, 156, 180, 188, 195, 215, 250, 301 Spectroscopic binary, 39 Spence, 190 Spencer, 103 Spiral nebulæ, 72, 98, 116, 180, 206 Spica, 11, 127, 145, 146, 147, 148, 149, 152 Square of Pegasus, 5, 30, 59, 78, 79, 159, 192 Stars, 7, 8, 9, 12, 16, 61, 64, 100, 189, 301 number, 9 distance, 39, 100, 101, 141, 142 fixity, 8, 40 pathways, 9 proper motion, 163 magnitude, 10 names, 10, 11 life cycle, 13, 15, 156 diameter, 12, 99, 122, 172 color, 3, 10, 13 giant, 13, 172 dwarf, 13, 172 variable, 82, 115, 164, 188 dark, 61, 64, 122 runaway, 98, 99 shooting, 90, 91, 239, 241, 244, 245, 246 double, 62, 90, 98, 115, 122, 135, 140, 147, 149, 155, 184, 177, 195 triple, 72, 90, 157, 177, 194 telescopic, 10 clusters, 92, 94, 113, 157, 186, 195, 209, 210 double cluster, 65 as clocks, 38, 62, 96