[Roman figures refer to the chapters, Arabic to the articles.]
De Mundi aetherei (of Tycho), v. 104
De Nova Stella (of Tycho), v. 100
De Revolutionibus (of Coppernicus), ii. 41 n; iv. 74–92; v. 93, 94; vi. 126
De Saturni Luna (of Huygens), viii. 154
Descriptive astronomy, xiii. 272, 273, 294
Deviation error, x. 225 n
Dialogue on the Two Chief Systems (of Galilei), vi. 124 n, 128–132, 133
Differential method of parallax, vi. 129; xii. 263; xiii. 278
Diffraction-grating, xiii. 299
Dione, viii. 160
Dioptrice (of Kepler), vii. 138
Direct motion, i. 14
Disturbing force. See Perturbations
Diurnal method of parallax, xiii. 281, 284
Doctrine of the sphere. See Spherics
Doppler's principle, xiii. 302, 313, 314
Double hour, i. 16
Double-star method of parallax. See Differential method of parallax
Double stars. See Stars, double and multiple
Durchmusterung, xiii. 280
Dynamics, vi. 133, 134; ix. 179, 180; xi. 230, 232, 237
Dynamique, Traite de (of D'Alembert), xi. 232
Earth, i. 1, 15, 17; ii. 28, 29, 32, 39, 41, 43, 47, 49, 51; iii. 66, 69; iv. 80, 86; vi. 117, 121, 133; vii. 136 n, 144, 145, 150; viii. 153, 154; ix. 173, 174, 179–182, 184, 186, 195; xi. 228, 245; xiii. 285, 287, 292, 293, 297, 320. See also the following headings
Earth, density, mass of, ix. 180, 185, 189; x. 219; xi. 235; xiii. 282, 294
Earth, motion of, ii. 24, 32, 47; iv. 73, 76, 77; v. 96, 97, 105; vi. 121, 125–127, 129–132; viii. 161, 162; ix. 186, 194; xii. 257. See also Earth, revolution of and rotation of
Earth, revolution of, annual motion of, ii. 23, 24, 28 n, 30, 47; iv. 75, 77, 79–82, 85–88, 89, 90, 92; v. 111; vi. 119, 126, 129, 131, 133; vii. 139, 142, 146; viii. 161; ix. 172, 183; x. 207–210, 212, 227; xi. 235, 236, 240; xii. 263; xiii. 278, 282, 283
Earth, rigidity of, xiii. 285, 292
Earth, rotation of, daily motion of, ii. 23, 24, 28 n; iv. 75, 78, 79 n, 80, 84; v. 105; vi. 124, 126, 129, 130; ix. 174, 194; x. 206, 207, 213; xiii. 281, 285, 287, 320
Earth, shape of, ii. 23, 29, 35, 45, 47, 54; iv. 76; viii. 161; ix. 187, 188; x. 196, 213, 215, 220, 221, 222, 223; xi. 229, 231, 237, 248
Earth, size of, ii. 36, 41, 45, 47, 49; iii. 57, 69; iv. 85; vii. 145; viii. 159, 161; ix. 173, 174; x. 221, 222, 223
Earthshine, iii. 69
Easter, rule for fixing, ii. 20
Eccentric, ii. 37, 39, 40, 41, 48, 51; iii. 59; iv. 85, 89–91; vii. 139, 150
Eccentricity, ii. 39; iv. 85; vii. 140 n; xi. 228, 236, 240, 244–246, 250; xiii. 294, 318
Eccentricity fund, xi. 245