ned, 305;
parallax of, first ascertained, 173, 280

Stars, the, 20, 124, 126, 278 _et seq._;
brightness of, 287, 320;
distances between, 326-327;
distances of some, 173, 280, 320;
diminution of, below twelfth magnitude, 324;
evolution of, from nebulae, 317-318;
faintest magnitude of, 288;
number of those visible altogether, 324;
number of those visible to naked eye, 288

"Steam cracks," 221

Steinheil, 118

Stellar system, estimated extent of, 325-327;
an organised whole, 327;
limited extent of, 322-328, 330;
possible disintegration of, 329

Stiklastad, eclipse of, 88

Stone Age, 285

Stoney, G.J., 202, 222

Stonyhurst Observatory, 100

_Story of the Heavens_, 271

Streams of stars, Kapteyn's two, 284

Stroobant, 196

Stukeley, 91

Sulphur, 145

Summer, 175, 178

Sun, Chaps XII. and XIII.;
as a star, 124, 278, 289;
as seen from Neptune, 246, 304;
chemical composition of, 144-145;
distance of, how ascertained, 151, 211;
equator of, 135-136, 139;
gravitation at surface of, 129, 138-139;
growing cold of, 343-344;
mean distance of, from earth, 47, 211;
motion of, through space, 282-286, 326;
not a solid body, 136;
poles of, 136;
radiations from, 130;
revolution of earth around, 170-173;
stellar magnitude of, 288-289;
variation in distance of, 66, 178

Sunspots, 34, 125, 134-137, 140-141, 143-144, 308;
influence of earth on, 144

Suns and possible systems, 50, 286

Superior conjunction, 147-149

Superior planets, 22, 146, 209-210, 229

Swan (constellation). _See_ Cygnus

Swift, Dean, 224

"Sword" of Orion, 297, 316

Syrtis Major. _See_ Hour Glass Sea

"_Systematic_ Parallax," 326

Systems, other possible, 50, 286

Tails of comets, 182

Tamerlane, 107

Taurus (constellation), 103, 296-297, 307

"Tears of St. Lawrence," 273

Tebbutt's Comet, 257-258

Telescope, 33, 55, 107-108, 149;
first eclipse of moon seen through, 104;
of sun, 90

Telescopes, direct view reflecting, 114;
gigantic, 111;
great constructors of, 117-118;
great modern, 117-118

Tempel's Comet, 274

Temperature on moon, 203;
of sun, 128

Temporary (or new) stars, 310-314

Tennyson, Lord, 109, 296, 334

Terrestrial planets, 229-230

Terrestrial telescope, 117

Thales, Eclipse o