otograph of, 257-258;
furthest distance seen, 258;
passage of among satellites of Jupiter, 250;
passage of earth and moon through tail of, 257, 346

Comet of 1000 A.D., 262;
1066, 262-264;
1680, 255, 265;
1811, 254-255;
1861, 254, 257, 346;
1881, 257-258;
1882, 251, 258, 291;
1889, 258;
1907, 258

Comets, 27-28, 58, Chaps. XIX. and XX., 345-346;
ancient view of, 259-261;
captured, 251-253;
Chinese records of, 83-84;
composition of, 252;
contrasted with planets, 247;
families of, 251-252, 256;
meteor swarms and, 274;
revealed by solar eclipses, 95-96;
tails of, 141, 182, 248, 252-254

Common, telescopes of Dr. A.A., 118

Conjunction, 209

Constellations, 105, 278-279, 285, 289

Contraction theory of sun's heat, 128-129, 335

Cook, Captain, 154

Cooke, 118

Copernican system, 20, 107, 149, 170-173, 279, 280

Copernicus, 20, 108, 149, 158, 170-172, 236

Copernicus (lunar crater), 200, 204

Copper, 145

Corder, H., 144

Corona, 70-72, 90, 92-97, 132, 140-141, 270;
earliest drawing of, 91;
earliest employment of term, 90;
earliest mention of, 86;
earliest photograph of, 93;
illumination given by, 71;
possible change in shape of during eclipse, 96-98;
structure of, 142-143;
variations in shape of, 141

Corona Borealis (constellation), 295

Coronal matter, 142;
streamers, 95-96, 141-143

Coronium, 133, 142, 317

Cotes, 91

Coude, equatorial, 119

Cowell, P.H., 255, 264

Crabtree, 152

Crape ring of Saturn, 236-237

Craterlets on Mars, 220

Craters (ring-mountains) on moon, 197-205, 214, 340;
suggested origin of, 203-204, 214

Crawford, Earl of, 94

Crecy, supposed eclipse at battle of, 88-89

Crescent moon, 183, 185

Crommelin, A.C.D., 255, 264

Crossley Reflector, 118, 315-316

Crown glass, 115

Crucifixion, darkness of, 86

Crucis, [a] (Alpha), 298

Crux, or "Southern Cross" (constellation), 298-299, 323

Cycle, sunspot, 136-137, 141, 143-144

Cygni, 61, 173, 280

Cygnus, or the Swan (constellation), 295, 325

Daniel's Comet of 1897, 258

Danzig, 111

Dark Ages, 102, 107, 260

Dark eclipses of moon, 65, 102-103

Dark matter in space, 323

Dark meteors, 275-276

Dark stars, 309-310, 312, 323, 346-347

"Darkness behind the stars," 325

D