Metals in sun, 145 Meteor swarms, 268-269, 271, 274-275 Meteors, 28, 56, 167, 259, Chap. XXI. Meteors beyond earth's atmosphere, 275-276 Meteorites, 276-277 Meteoritic Hypothesis, 335 Metius, Jacob, 108 Michell, 283, 305 Middle Ages, 102, 260, 264 Middleburgh, 108 Milky Way (or Galaxy), 285, 299, 311, 317, 319-327; penetration of, by photography, 325 Million, 47, 51-52 Minor planets. _See_ Asteroids. Mira Ceti, 307-308 "Mirk Monday," 89 Mirror (speculum), 111, 116 Mizar, 294, 302 Monck, W.H.S., 275 Mongol Emperors of India, 107 Moon, 26, Chap. XVI.; appearance of, in lunar eclipse, 65, 102-103; diameter of, 189; distance of, how ascertained, 58; distance of, from earth, 48; full, 63, 86, 149, 184, 189, 190, 206; mass of, 200, 202; mountains on, 197-205; how their height is determined, 201; movement of, 40-42; new, 86, 149, 183, 185; origin of, 339-341; plane of orbit of, 63; possible changes on, 204-205, 221; "seas" of, 197, 206; smallest detail visible on, 207; volume of, 200 Morning star, 149-150, 241 Moulton, F.R., 31, 118, 128, 302, 335, 337 Moye, 154 Multiple stars, 300 Musa-ben-Shakir, 44 Mythology, 105 Neap-tides, 179 Nebulæ, 314-318, 328, 335, 345; evolution of stars from, 317-318 Nebular Hypothesis of Laplace, 333-338 Nebular hypotheses, Chap. XXVII. Nebulium, 317 Neison, 206 Neptune, 20, 25, 31, 34, 37, 243-246, 249, 252, 274, 304; discovery of, 23-24, 94, 210, 236, 243-244; Lalande and, 244; possible planets beyond, 25, 252; satellite of, 26, 245; "year" in, 35-36 "New" (or temporary), stars, 310-314 Newcomb, Simon, 181, 267, 281, 324, 326-327, 329 Newton, Sir Isaac, 40, 44, 91, 111-113, 115, 165, 172, 237, 255 Newtonian telescope, 112, 114, 116, 119 Nineveh Eclipse, 84-85 Nitrogen, 145, 156, 166, 346 Northern Crown, 295 Nova Aurigæ, 311 Nova Persei, 312-314 Novæ. _See_ New (or temporary) stars Nubeculæ, 317 "Oases" of Mars, 216, 220 Object-glass, 109 Oblate spheroid, 165 Occultation, 61-62, 202, 296 _Olaf, Saga of King_, 88 Olbers, 227, 253, 256, 271 "Old moon in new moon's arms," 185 Olmsted, 271 Omicron (or "Mira") Ceti, 307-308 Opposition, 209 "Optick tube," 108-109, 232 Orange (rays of light), 121 Orbit of moon, plane of, 63 Orbits, 32, 36-37, 66, 150, 157 Oriental astronomy, 107 Orion (constellation), 195, 279, 296-297, 316; Great Nebula in, 316, 328 Oxford, 139 Oxygen, 145, 156, 166, 346 Pacific Ocean, origin of moon in, 339 Palitzch, 255 Pallas, 225, 227 Parallax, 57, 173, 280, 305, 320, 326 Paré, Ambrose, 264-265 Peal, S.E., 205 Peary, 277 Pegasus (constellation), 306 Penumbra of sunspot, 135 Perennial full moon of Laplace, 190 Pericles, 84 Perrine, C.D., 232-233, 315 Perseids, 270, 273-275