, spectrographic researches, 386
Canopus, remoteness, 37, 417;
spectrum, 416
Capella, spectrum, 373, 383, 384;
a spectroscopic binary, 389
Carbon, material of photosphere, 152;
absorption by, in sun, 212;
in stars, 374
Carbonelle, origin of meteorites, 340
Carinae, Eta, light variation, 48, 49;
spectrum, 379
Carrington, astronomical career, 144, 145;
sun-spot observations, 146;
solar rotation, 147;
spot-distribution, 148;
luminous outburst on sun, 159, 160;
Jovian and sun-spot periods, 163;
origin of comets, 370
Cassini, Domenico, discoveries of Saturnian satellites, 84;
of division in ring, 85;
solar rotation period, 146;
solar parallax, 228;
rotation of Venus, 250;
of Mars, 274;
of Jupiter, 290, 295;
satellite of Venus, 256;
satellite-transit on Jupiter, 291
Cassini, J. J., stellar proper motions, 10;
sun-spots on limb, 54;
theory of corona, 66;
rotation of Venus, 250;
structure of Saturn's rings, 299
Castor, system of, 18, 389
Cavendish experiment, 60, 261
Ceres, discovery, 73, 74;
diameter, 75, 288
Chacornac, observation of sun-spot, 156;
star-maps, 284, 413;
variable nebula, 403
Challis, search for Neptune, 81, 82;
duplication of Biela's comet, 96
Charlois, discoveries of minor planets, 283
Charroppin, coronal photographs, 186
Chase, photographic discovery of a comet, 338;
stellar parallaxes, 416
Chladni, origin of meteors, 327, 332
Christie, Mercurian halo, 245
Chromosphere, early indications, 68;
distinct recognition, 69, 70, 167;
depth, 174, 175, 200;
metallic injections, 195;
eruptive character, 199;
spectrum, 200
Clark, Alvan, large refractors, 114, 429, 430, 436
Clark, Alvan G., discovery of Sirian companion, 42, 430;
40-inch refractor, 433
Clarke, Colonel, figure of the earth, 262
Clarke, F. W., celestial dissociation, 206
Clausen, period of 1843 comet, 105;
cometary systems, 362
Clerihew, secondary tail of 1843 comet, 103
Clusters, variable stars in, 436
Coggia, discovery of a comet, 343
Comet, Halley's, return in 1759, 4, 88;
orbit computed by Bessel, 29;
capture by Neptune, 98, 365;
return in 1835, 101-103, 345;
type of tail, 346, 352;
of 1843, 7, 103-105;
type of tail, 346, 352;
relationships, 349
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