INDEX OF SUBJECTS
The numbers refer to the pages
a Aquilae (Altair), 7, 53
a Aurigae (Capella), 41, Plate VI (p. 49), 57, 59
a Bootis (Arcturus), 41, Plate VI (p. 49), 56, 59
a Canis Maj. (Sirius), 5, 7, 31, 33, 41, Plate VI
(p. 49), 58, 59, 129, 130, 182
a Canis Min. (Procyon), 7, 33, 41, Plate VI
(p. 49), 63, 182
a Centauri, 5, 7, 8, 23, 24, 31, 33, 59, 129, 130,
298
a Cygni (Deneb), 41, 53
a Lyrae (Vega), 8, 31, 41
a Orionis (Betelgeux), 41, Plate VI (p. 49), 56,
59, 129
a Scorpii (Antares), 56, 59
a Tauri (Aldebaran), 41, 53
a Ursae Min. (Polaris), 41, 53, 313, 382
Absorption-lines in stellar spectra, 48, 49
Absorption of radiation, 83
Adiabatic equilibrium, 61, 92, 258
Age of the earth, 396, 409
,, universe, 139, 381, 421
Ages of the stars, 129, 130, 139, 185, 316 ff.,
376, 380, 381, 417
Albert (asteroid), 4
Aldebaran, 41, 53
Altair, 7, 53
Andromeda, nebula M 31 in, Plates I (p. 15),
VII (p. 331), VIII (p. 332), 15,
18, 19, 333, 352
Angstrom unit (A), 39
Annihil ation of matter, 113, 127, 135, 139, 418
Antares, 56, 59
Arcturus, 41, Plate VI (p. 49), 56, 59
Asteroids, 3
Atomic diameters, 48, 412
,, numbers and atomic weight of stellar
matter, 102, 103, 108, 112, 134,
161, 167, 380, 419
,, structure, 412
|3 Cephei, 382, 390
(3 Lyrae, 288, 289
|3 Orionis (Eigel), 41, 53
B-type stars, system of, 375
Belt of Orion, 3, 24
Betelgeux, 41, Plate VI (p. 49), 56, 59, 91, 129
Bifurcation, points of, 189
Binary stars, 20, 225, 288, 310, 323
,, ,, eccentricities and periods of, 21,
289, 290, 291, 295, 301, 305,
306, 307
„ „ mass-ratio in, 326
,, ,, number of, 22
,, ,, planes of orbits of, 379
,, „ spectroscopic, 20, 288, 290, 310,
325, 326, 327
,, ,, visual, 20, 178, 291, 310
Birth of stars, 328, 350, 380
Bolometric correction, 43, 45, 46
,, magnitude, 42, 48
Braking action of radiation, 274
Calcium clouds, 28
Capella, 41, Plate VI (p. 49), 57, 59, 180
Cepheid parallaxes, 10, 18, 25
,, variables, 11, 12, 23, 382, 387, 388,
391, 394
Chemical elements, 51
„ ,, in solar spectrum, 51
,, ,, in stars, 133, 134
Clusters (globular), 12, Plate III (p. 25), 25,
26, 372, 377
„ (moving), 24, 26, 372, 375, 379, 417
,, (open), 26
Collisions of stars, 319
Colour-index, 42, 43, 45, 54
Companion of Sirius (Sirius B ), 33, 58, 59, 132,
182
Condensations in spiral nebulae, 345, 379, 416
Contraction-theory of stellar energy, 110, 122
Convection currents, 69, 92, 93
8 Cephei, 11, 383, 387
Decrease of stellar mass, 114, 131, 298, 417
“Degeneracy” of stellar gas, 74
Deneb, 41, 53
Density of star distribution in space, 8,12,15,
17, 368
Density distribution inside a star, 91, 282
Distances, stellar, 1, 5, 9
,, nebular, 18, 341
Dwarf stars, 61
Dwarfs (white), 63,132, 143, 160, 165,180, 181,
182, 184, 185, 419