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[Roman figures refer to the chapters, Arabic to the articles.]

Mécanique Celeste (of Laplace), xi. 238, 241, 247, 249, 250; xiii. 292

Medicean Planets. See Jupiter, satellites of

Meraga, iii. 62

Mercury, i. 14–16; ii. 25, 26, 45, 47, 51; iii. 66; iv. 73, 75, 81, 86–89; vi. 121, 124; vii. 136, 139, 142, 144; ix. 185; xiii. 288, 290, 294, 297. See also the following headings

Mercury, mass of, xi. 248

Mercury, phases of, vi. 129

Mercury, rotation of, xiii. 297

Mercury, transit of, x. 199

Meridian, ii. 33, 39; iii. 57; vi. 127; viii. 157; x. 207, 218, 221

Meteorologica (of Aristotle), ii. 27

Meteors, xiii. 305

Meton's cycle, ii. 20

Metric system, xi. 237

Micrometer, viii. 155; xiii. 279, 281

Milky Way, ii. 30, 33; vi. 120; xii. 258, 260–262; xiii. 317

Mimas, xii. 255

Minor planets, xi. 250 n; xiii. 276, 281, 284, 288, 294, 295, 297, 318

Minor planets, mass of, xiii. 294

Minute (angle), i. 7

Mira, xii. 266

Mongols, Mongol astronomy, iii. 62

Month, i. 4, 16; ii. 19–21, 40, 48; ix. 173; xi. 240; xiii. 293, 320. See also the following headings

Month, anomalistic, ii. 40

Month, draconitic, ii. 40, 43

Month, empty, ii. 19, 20

Month, full, ii. 19, 20

Month, lunar, i. 16; ii. 19, 20, 40

Month, sidereal, ii. 40

Month, synodic, ii. 40, 43

Moon, i. 1, 4, 5, 11, 13–16; ii. 19–21, 25, 28, 30, 32, 39, 43; iii. 68, 69; iv. 81, 86; v. 104, 105 n; vi. 119, 121, 123, 129, 130, 133; vii. 145, 150; viii. 153; ix. 169, 180, 181, 188, 189; x. 198, 204, 213, 215, 226; xi. 228, 235; xii. 256, 257, 271; xiii. 272, 292, 293, 296, 297, 301, 320. See also the following headings

Moon, angular or apparent size of, ii. 32, 41, 43, 46 n, 48; iv. 73, 85, 90; v. 105

Moon, apparent flattening of, ii. 46

Moon, atmosphere of, xiii. 296

Moon, distance of, i. 15; ii. 24, 25, 30, 32, 41, 43, 45, 48, 49, 51; iv. 85, 90; v. 100, 103; ix. 173 185; x. 223; xiii. 293, 320

Moon, eclipses of. See Eclipses

Moon, librations of, vi. 133; x. 226; xi. 237, 239

Moon, map of, x. 226; xiii. 296

Moon, mass of, ix. 188, 189 xi. 235

Moon, motion of, i. 4, 8, 13, 15, 17; ii. 20, 24–26, 28, 37, 39, 40, 43, 47, 48, 51; iii. 60; iv. 73, 81, 85, 89, 90; v. 111; vi. 133; vii. 145, 150; viii. 156; ix. 169, 173, 174, 179, 184, 185, 189, 194, 195; x. 201, 204, 213, 226; xi. 235, 237, 248; xiii. 287, 290, 297, 320. See also Lunar theory

Moon, origin of, xiii. 320

Moon, parallax of, ii. 43, 49; iv. 85. Cf. also Moon, distance of

Moon, phases of, i. 4, 16, 17; ii. 19, 20, 23, 28, 43, 48; iii. 68, 69; vi. 123

Moon, rotation of, x. 226; xi. 248; xii. 267; xiii. 297

Moon, shape of, ii. 23, 28, 46; vi. 119; xi. 237

Moon, size of, ii. 32, 41; iv. 85

Moon, tables of. See Tables, lunar