Apparent diameter of moon, 49 Apple, 79 "Apples, golden," 258 Apus, 306 Aquarius, 268 Aquila, 246 Aquillus, 220 Ara 295 Arago, 26, 30, 57, 116, 193, 331 Aratus, 219, 242, 245, 250, 255, 256, 261, 263, 272 Archimedes, 346, 354 Arcturus, 148, 188, 244 Argelander, 29, 227, 229, 230, 240 Argo, 285-288, 305 Argon in sun, 4 Argonauts, 243, 250 Aries, 250 Aristotle, 49, 67 Arrhenius, 4, 8, 22, 45, 66 Ashtoreth, 260 _Astra Borbonia_, 4 Astræa, 263 Astronomy, Laplace on, 44 _Astro Theology_, 23 Atarid, 232, 233 Atmosphere, height of, 33 Augean stables, 269 Augustus, 262 Auriga, 245 Aurora, 33, 41, 42 Auwers, 206 Axis of Mars, 59 B Babilu, 267 Baily, 137, 144 Baker, 183 Ball, Sir Robert, 6, 355 Barnard, Prof., 29, 54, 57, 79, 80, 81, 85, 86, 91, 93, 103, 104, 114, 130, 132, 139, 192, 213, 316, 317, 350 Barnes, 78, 79 Bartlett, 35, 36 Bartschius, 296, 298 Bauschingen, 69, 70 Bayer, 179, 221, 272, 284, 309, 310 Bayeux Tapestry, 105 Becquerel, 8 "Beehive," 259 Beer, 20 Bel, 250 Bellatrix, 253 Benoit, 22 Berenice, 297 Berry, 25 Bessel, 339 Betelgeuse, 179, 222, 264 Bianchini, 21, 22, 77 Biela's comet, 99 Bifornis, 268 Binary stars, 162 Birmingham, 5, 114 "Black body," 3 "Blackness" of sun-spots, 6 "Blaze star," 180, 184 Bode, 276 Bohlin, 199, 200 Bond, 85 Bond (Jun.), 74 _Book of the Dead_, 264, 274 Borelly, 103 Boserup, 28 Boss, 152 Brahé, Tycho. _See_ Tycho Brahé Brauner, 211 Bravais, 42 Bredikhin, 76 Bremiker, 94 Brenner, Léo, 13, 22, 87, 91, 133 Brewster, 356 Brightness of Mercury, 10-12 " of nebulæ, 193 " of sun, 1, 2, 3 " of Venus, 14, 17, 19, 31 Bright clouds, 33, 34 " night, 45 " stars, 278 Brooks, 118 Brown, 218, 219, 248, 255, 260, 267, 272, 279, 281, 291, 295 Browning, 25 Brugsch, 127 Buddha, 256 Bull, Pope's, 107 "Bull's foot," 253 Buonaparte, 30 Burnham, 160, 165-167, 180, 184, 260, 350, 351 Burns, 130 Buss, 4 C Caaba, 125 Cacciatore, 72 Cælum, 302 Callimachus, 297 Callixtus III., 107 Calvisius, 53 Camelopardalis, 296 Cameron, 18 Campbell, 85, 153, 159, 178 "Canals" on Mars, 61-63 Cancer, 258, 259 Canes Venatici, 296 Canicula, 280 Canis Major, 279 " Minor, 284 Canopus, 157, 286, 344 Capella, 156, 164, 189, 236, 245, 246 Capricornus, 267, 268 "Capture" of satellites, 58 Carbonic acid, 66 Cassini, 20, 22, 74, 78, 358 Cassiopeia's Chair, 244 Castor, 160, 257 Caswell, 52 Catullus, 297 Caussin, 225 Cecrops, 268 "Celestial Rivers," 308 Celoria, 324, 326 Centaurus, 292, 293 Centre of gravity, 8 Cephalus, 279 Cepheid variables, 187 Ceraski, 2, 176 Cerberus, 243, 257 Ceres, 260 Cerulli, 22, 62 Cetus, 272