[Roman figures refer to the chapters, Arabic to the articles.]
Poles (of the earth), iv. 82; ix. 187; x. 220, 221; xiii. 285
Pollux, xii. 266
Pons-Brooks comet, xiii. 291
Postulates (of Ptolemy), ii. 47
Postulates (of Coppernicus), iv. 76
Praesepe, xii. 260
Precession (of the equinoxes), ii. 42, 50; iii. 58, 59, 62, 68; iv. 73, 83, 84, 85; v. 104, 112; vi. 129; ix. 188, 192; x. 213–215, 218, 221; xi. 228, 232, 248; xiii. 277, 280
Prima Narratio (of Rheticus), iv. 74; v. 94
Primum Mobile, iii. 68
Principia (of Descartes), viii. 163
Principia (of Newton), iv. 75 viii. 152; ix. 164, 177-192, 195; x. 196, 199, 200, 213; xi. 229, 234, 235, 240
Principles of Philosophy (of Descartes), viii. 163
Probabilités, Théorie Analytique des (of Laplace), xi. 238
Problem of three bodies. See Three bodies, problem of
Prodromus Cometicus (of Hevel), viii. 153
Prominences, xiii. 301, 302, 303
Proper motion (of stars), x. 203, 225; xii. 257, 265; xiii. 278, 280
Prosneusis, ii. 48; iii. 60; iv. 85
Prussian Tables, v. 94, 96, 97, 99; vii. 139
Quadrant, v. 99; x. 218, 225 n
Quadrature, ii. 48; iii. 60; v. 111
Quadrivium, iii. 65
Recherches sur différens points (of D'Alembert), xi. 233, 235
Recherches sur la précession (of D'Alembert), xi. 215
Reduction of observations, x. 198, 218; xiii. 277
Reflecting telescopes, ix. 168; xii. 251–255
Refracting telescopes, ix. 168. See also Telescopes
Refraction, ii. 46; iii. 68; v. 98, 110; vii. 138; viii. 159, 160; x. 217, 218, 223; xiii. 277
Relative motion, principle of, iv. 77; ix. 186 n
Renaissance, iv. 70
Results of Astronomical Observations (of John Herschel), xiii. 308
Retrograde motion, i. 14
Reversing stratum, xiii. 303
Reviews of the heavens, xii. 252, 253
Revival of Learning, iv. 70
Rhea, viii. 160
Rigel, iii. 64
Right ascension, ii. 33, 39; x. 198, 218; xiii. 276
Rills, xiii. 296
Rings of Saturn. See Saturn, rings of
Rotation of the celestial sphere. See Daily motion
Rotation of the earth, sun. Mars, etc. See Earth, Sun, Mars, etc., rotation of
Royal Astronomical Society. See Astronomical Society, Royal
Royal Society, ix. 166, 174, 177, 191, 192; x. 201, 202, 206, 208; xii. 254, 256, 259, 263; xiii. 292, 308
Rudolphine Tables, v. 94; vii. 148, 151; viii. 156
Ruler, i. 16
Running down of the solar system, xiii. 293, 319
Saggiatore (of Galilei), vi. 127
Sappho, xiii. 281
